Medical Staff

Richard Rosenthal, M.D

Richard Rosenthal, M.D. is a world renowned Pain Medicine Physician who has incorporated regenerative injection therapies into his everyday pain medicine practice. He is board certified in Anesthesiology, Pain Medicine, Addiction Medicine and Interventional Pain Medicine. He graduated from the University of Utah medical school in 1985. In 1993 he graduated from an anesthesia residency at the University of Texas at San Antonio Medical Center. He is the Founder, President, and Medical Director of Nexus Pain Specialists.
Dr. Rosenthal has distinguished himself as a leader in educating and training medical professionals in the fields of Interventional Pain and Regenerative Medicine. He is the editor of the interventional pain section of the widely read journal, Practical Pain Management.  He developed a one-year pain medicine fellowship which teaches young physicians the skills in Interventional Pain and Regenerative Medicine. Dr. Rosenthal is a master instructor for the prestigious organization the Spinal Intervention Society.  He has taught physicians in both the United States and Europe how to correctly perform various spinal procedures.  He has authored several scientific articles and book chapters on topics in the specialty of pain medicine. He is also involved in clinical research and has served as an expert witness in malpractice cases. His clinic was awarded the Excellence in Multi-disciplinary Pain Care Award by the World Institute of Pain (one of only 4 clinics in the United States to receive the award in 2011).
Dr. Rosenthal has been practicing Regenerative Medicine for the past several years. He has acted as Course Director for more than 30 Regenerative Medicine courses and has also lectured at several national conferences.  He specializes in the use of stem cells and platelet rich plasma for the treatment of painful joints, including the knee, hip and shoulder. His treatments are based on a comprehensive approach to relieving pain and improving function.  Dr. Rosenthal has lectured on the topic of Regenerative Medicine, especially Platelet Rich Plasma and Stem Cells treatments, for such prestigious organizations as the American Society of Interventional Pain Physicians and the Society for Pain Practice Management.

George Chang Chien, DO

George C. Chang Chien, D.O. specializes in musculoskeletal medicine and comprehensive pain management. He was trained in Physical Medicine & Rehabilitation at the Rehabilitation Institute of Chicago, the #1 Ranked Rehabilitation Hospital in the United States since 1991. After completion of his Physiatry training, he completed fellowship training in comprehensive pain medicine at the prestigious Cleveland Clinic Anesthesiology Institute.

Dr. Chang Chien has authored over 100 manuscripts on a variety of topics including Regenerative Medicine, orthopedics, and advanced interventional procedural medicine. He has active research in regenerative medicine applications for medical aesthetics, pain management, sports-related injuries, and has been a collaborator on multiple multi-center studies.

Dr. Chang Chien speaks regularly throughout the world on Regenerative Medicine. His professional teaching experience includes being a CIPS Examiner for the World Institute of Pain, ABIPP examiner for Regenerative Medicine and Interventional Pain, ultrasound course Director at the Cleveland Clinic, Regenerative Medicine Course Director for American Society of Interventional Pain Physicians, and the Society for Pain Practice Management.

Dr. Chang Chien specializes in all aspects of Regenerative Medicine and has distinct expertise in platelet rich plasma (PRP), bone marrow aspiration for stem cells (BMAC), and adipose-derived stem cells (ADSC).

He is the Founder of the GCC Institute, Medical Director for Pain Management at Ventura County Medical Center, and the Director for the Center for Regenerative Medicine at Southern California University. He is the Director for Medical Education of Apex Biologix, and serves in the editorial board for Pain Physician medical journal and is the section editor for Regenerative Medicine.

To learn more about Dr. George C. Chang Chien, you can visit his website at

Aaron Calodney, MD

Dr. Calodney earned his medical degree from the University of Missouri School of Medicine and completed a family medicine internship at St Joseph’s Hospital in Syracuse, New York. His residency in anesthesiology and subsequent interventional pain management fellowship was completed at the University of Texas Health Science Center at Houston. He subsequently completed a fellowship in pediatric anesthesia at the Denver Children’s Hospital. After spending several years as a faculty member in the Department of Anesthesiology at the UT medical school in Houston, Dr. Calodney moved to East Texas where he has practiced since 1991.

With particular interest in Spine and special interests including Neuromodulation and Intrathecal Drug Delivery, Biological treatment of the painful degenerative disc, Peripheral nerve injury, and Radiofrequency ablation, Dr. Calodney has presented and published many articles and textbook chapters. He is actively involved in clinical research and has delivered over 250 invited lectures in the US and abroad. Dr. Calodney also specializes in treating pain through the use of regenerative medicine and implements these techniques, when applicable, into his practice.

Dr. Calodney is a member of the American Society of Anesthesiologists, American Society of Regional Anesthesia and Pain Medicine, International Spine Intervention Society, International Neuromodulation Society, American Society of Interventional Pain Physicians, North American Neuromodulation Society, Texas Pain Society, Texas Medical Association, Texas Society of Anesthesiology, and the Smith County Medical Society.

Arthur Watanabe, MD

Dr. Watanabe graduated from the University of California with a Doctor of Pharmacy degree and from the University of Cincinnati with a Doctor of Medicine degree. He successfully completed an internal medicine internship and diagnostic radiology residency at the University of Utah Medical Center. He completed a neuroradiology fellowship at Long Beach Memorial Medical Center. He is sub-specialized in the practice of interventional pain management and has been practicing in this specialty since 1997. He is board certified by the American Board of Radiology and a member of the International Spinal Intervention Society, American Society of Interventional Pain Physicians and the American Society of Spine Radiologists as well as the Spokane County Medical Society and Washington State Medical Association.

Steve Aydin, DO

Dr. Aydin is Chief of Physical Medicine and Rehabilitation and Interventional Pain Management at Kayal Orthopaedic Center, as well as Clinical Assistant Professor at Hofstra – Northwell Health. In, 2010 after completing an anesthesia-based pain management fellowship at the University of Michigan Health System, he joined Manhattan Spine and Pain, and was appointed clinical assistant professor of PMR in 2013.

In addition to specializing in pain management, Dr. Aydin is board-certified in physical medicine and rehabilitation. He completed his training at the Kessler Institute for Rehabilitation, in New Jersey. He took an avid interest in pain management early in his training, and worked to address it in patients with traumatic brain injury, stroke, and spinal cord injury. “Physical medicine and rehabilitation focuses on musculoskeletal medicine—the body’s interconnected system of nerves, muscles and bones,” said Dr. Aydin. “This training offers a better understanding of how an injury or problem in one part of the body can affect other parts, which is important when developing nonsurgical strategies to help people regain normal function and pain control.”

Matt Murphy, PhD

Dr. Murphy designs and implements new strategies for the isolation and application of autologous stem cells for spine, orthopedics, and cardiovascular therapies. Dr. Murphy was a senior researcher at Methodist Hospital Research Institute in Houston, Texas, where he focused on the combination of adult stem cells and biomaterials for regenerative medical applications in orthopedics, spine, pancreatic, and soft tissue repair. At Rice, he researched novel biomaterials for bone and cartilage regeneration and developed targeted drug delivery strategies. He also worked at NASA on the design of new spacesuits for travel to the moon and Mars as part of the Constellation Program. He has authored twelve peer-reviewed publications and two textbook chapters related to tissue engineering and drug delivery. Dr. Murphy holds a Ph.D. in Bioengineering from Rice University and a B.S. in Chemical Engineering from The University of Texas at Austin.

Sudhir Diwan, MD

Dr. Sudhir Diwan is a top-rated, highly sought after pain management specialist and serves as the executive director of Manhattan Spine & Pain Medicine. Dr. Diwan is well-known for treating the most complex and challenging cases of chronic pain through numerous interventional procedures and is a leading specialist in regenerative medicine.

Dr. Diwan has provided his expertise in pain medicine to articles appearing in leading newspapers including The New York Times and The Los Angeles Times, and has made various television appearances including Fox 5’s Good Day New York and Health Headlines on CBS for the latest research on radiofrequency lesioning for chronic back pain.

In addition to his busy pain management practice, Dr. Diwan lectures extensively and interacts regularly with experts in the field of pain medicine nationally and internationally. He has been a guest speaker for many noteworthy organizations including the American Cancer Society, the American Society of Anesthesiology, the American Society of Regional Anesthesia and Pain Medicine, the World Institute of Pain, and numerous pain specialty societies and congresses in Europe. He is also a regular speaker for the New York State Society of Anesthesiologists on the topic of pain management and management of cancer pain.

Sireen Gopal, MD

Dr. Sireen Gopal has been triple board certified in the areas of Physical Medicine & Rehabilitation, Pain Medicine, and Neuromuscular Medicine. Dr. Gopal is President and Founder of both New York Spine & Sports Rehabilitation Medicine PC and New York Advanced Surgical Interventions Care PLLC. Both of his clinics provide advanced regenerative medicine therapies with refined techniques and experience.

Dr. Gopal is a specialist in the non-operative management of Spine and Musculoskeletal Disorders. His practice has a novel approach to treating musculoskeletal pain early with multidisciplinary options as needed. He also specializes in interventional pain treatments for several conditions and incorporates regenerative medicine in his private practice when applicable.

Dr. Gopal’s scientific work includes a Chapter on the “Work up of Neck Pain and Low Back Pain” published in the Physical Medicine and Rehabilitation Clinics of North America, Volume 8, No 1 February 1997. Dr. Gopal is a dynamic and personable instructor for regenerative medicine courses.

Orlando G. Florete, Jr, MD

Orlando G. Florete, Jr, MD, has received numerous scholarships and awards, among them the Winthrop Stearns Scholarship Award and the Community Service Award from the Department of Anesthesiology at the University of Florida College of Medicine. In 2011, Dr. Florete was recognized by the International Association of Anesthesiologists as one of the Leading Physicians of the World.

Dr. Florete is a highly esteemed and frequently invited speaker at both national and international symposia, lecturing on pain management and treatment algorithms.He is a member of several professional organizations, including the American Academy of Pain Medicine, the American Academy of Pain Management, American Society of Anesthesiologists, International Anesthesia Research Society, the American Pain Society, the Florida Academy of Pain Management, and others; he is a life member of the Winthrop Stearns Fellows and Scholars Association. Dr. Florete's research has been extensively published, with numerous book chapters and journal articles to his credit, as well as abstracts and teaching materials.

Dr. Florete received his medical degree from the Cebu Institute of Medicine in Cebu City, Philippines.He performed his internship and residency at the University of Philippines College of Medicine as well as a residency in Anesthesiology at the University of Florida College of Medicine. His postgraduate training includes fellowships in cardiology (University of Philippines) and critical care medicine (University of Florida) as well as additional pain management training at the University of Virginia and the University of Kentucky for his board certification.

Amy Killen, MD

Amy Killen M.D. received her Bachelor’s degree in Biomedical science from Texas A&M University and then her M.D. from UT Southwestern Medical School. She completed an Emergency Medicine residency at the University of Arizona and worked for many years in Austin, Texas as a board certified emergency physician before moving to Portland and becoming medical director of an anti-aging specialty clinic.

Now in Utah, Dr. Killen embraces bio-identical hormone therapy and personalized medicine and offers aesthetics services including Botox, Fillers, and Micro-needling. Dr Killen is also very enthusiastic about cutting-edge regenerative medicine techniques, using Platelet Rich Plasma (PRP) for skin rejuvenation, hair restoration, urinary incontinence, and sexual dysfunction.

Harry Adelson, ND

Dr. Harry Adelson was one of the very early adopters of stem cell therapy for the treatment of chronic spine pain. He has performed over 5,000 stem cell procedures and has injected stem cells into over 700 intervertebral discs, placing him solidly among the most experienced in the world with the use of stem cells for the treatment of chronic spine pain. He is the founder and medical director of Docere Clinics in Park City, Utah. When he is not working, he is enjoying life with his wife, Indira, and two young daughters, Beatrice Boudica and Vicky Wynn.

Tyna Moore, ND

Dr. Tyna Moore is the Owner of Core Wellness Clinic in Portland, OR. She specializes exclusively in the application of natural pain solutions and regenerative injection therapies. As both a board certified Naturopathic and Chiropractic physician, she brings a unique perspective and expertise to the diagnosis and treatment of pain and orthopedic conditions. Dr. Moore practices exclusively Regenerative Injection Therapies and non-surgical pain management for orthopedic and musculoskeletal conditions.

Tim Moseley, PhD

Tim completed his PhD from UC Davis in Cellular & Development Biology. He has a variety of specialties including cellular allograft technology, research and data analysis of stem cell studies and trials, and Management of regulatory requirements and product development. He is currently serving as the Chief scientific officer for Direct Biologics.

Sairam Atluri, MD

Dr. Atluri is rated by Becker Review as the one of the Top 70 Interventional Pain Physician in US and one of the Top 25 Interventional Pain Physician in Ohio.He is on the Task Force for the State Medical Board of Ohio to prevent Prescription Opioid Abuse. He is on expert witness panel for the State Medical Board of Ohio to prosecute physicians causing the epidemic of prescription opioid abuse. Dr. Atluri is triple board certified in Pain Management. He is certified by American Board of Specialities, American Society of Interventional Pain Physicians and World Institute of Pain. He is also board certified in Anesthesia.

He served as the Vice President of the Ohio Chapter of American Society of Interventional Pain Physicians. He was also a Speaker at the Annual and Semi-Annual national meetings of American Society of Interventional Pain Physicians.

Joel Baumgartner, MD

Dr. Joel Baumgartner is a board certified physician with a specialized fellowship in non-surgical orthopedics and sports medicine. He earned his medical degree from the University of North Dakota School of Medicine, and completed his family practice residency at the University of North Dakota. Dr. Baumgartner completed his advanced training in sports medicine with a fellowship in primary care sports medicine at Hennepin County Medical Center. He utilizes the latest in diagnostic and treatment technology to better treat musculoskeletal injury and pain. As an international speaker, he instructs both physicians and those in the medical industry on pain evaluation, diagnosis and the latest treatment options. Dr. Baumgartner has authored a book on Prolotherapy and PRP technique, He is also a contributing author on the subject of pain management for a variety of other popular publications. His family and faith remain his priority. Dr. Baumgartner’s favorite name to be called is “Daddy”.

Annu Navani, MD

Dr. Annu Navani is an anesthesiologist in Campbell, California and is affiliated with multiple hospitals in the area, including El Camino Hospital and Good Samaritan Hospital-San Jose. She received her medical degree from Medical College and Hospital Kolkata and has been in practice for more than 20 years.

Don Buford, MD

Dr. Buford specializes in arthroscopic shoulder and knee surgery and is very involved in surgeon education and new product development. He has served on the Arthroscopy Association of North America (AANA) Education and Admissions Committees. He lectures nationally and internationally on arthroscopic shoulder surgery topics and has published many articles and book chapters on shoulder surgery. He has also been a reviewer for the Journal of Shoulder and Elbow Surgery.  He has also appeared on Fox News in the Dallas area and on the Good Morning Texas television show.

Dr. Buford founded the Dallas PRP and Stem Cell Institute (Dallas PRP And Stem Cell Institute) to provide patients with cutting edge PRP and stem cell options for arthritis, back pain, sports injuries, and other musculoskeletal conditions. We continue to refine the indications and treatment standards for using orthobiologics in musculoskeletal conditions.
Our ultimate goal is to maximize our patients’ quality of life and minimize their disability from any musculoskeletal condition.

Josh Donaldson, ND

Dr. Donaldson's primary attention is centered on the prevention and treatment of disease and chronic pain disorders through appropriate dietary and lifestyle modifications, nutritional supplementation and various treatment modalities. He practices general family medicine, but has specific interests in chronic pain disorders, sports medicine/orthorpedics, mental/emotional disorders, cancer, healthy aging & natural hormone balancing, diabetes/obesity/wt management, heart disease as well as digestive disorders & detoxification.

Robert Kinne, M.D.

Robert Kinne, M.D. is double board certified in Physical Medicine and Rehabilitation and Sports Medicine. He earned his medical degree from Indiana University School of Medicine, after which he completed his residency in PM&R. Following, he completed two fellowships: the first in Interventional Spine and Pain Management and the second in Primary Care Sports Medicine, both with an emphasis on traditional as well as regenerative medicine treatments.


Dr. Kinne has a passion for sports and musculoskeletal medicine, utilizing both fluoroscopy and ultrasound in his daily practice. He has served as a team physician for multiple affiliated minor league hockey and baseball teams as well as NCAA universities. He remains committed to providing both traditional and novel treatment options for his patients and is well versed in many modalities. He has utilized and maintains expertise in various regenerative medicine applications including Platelet Rich Plasma, Bone Marrow Aspirate Concentrate and Adipose-derived MSCs for treatment of a variety of sports, spine, joint and other musculoskeletal injuries and conditions.


Outside of his clinical practice, he remains active in teaching, having provided lectures and hands-on training in ultrasound, fluoroscopic-guided procedures and regenerative medicine throughout the United States for numerous professional organizations including the American Medical Society for Sports Medicine, American Society of Interventional Pain Physicians and the Advanced Regenerative Medicine Institute. He stays involved with these societies as well as the Spine Intervention Society, Interventional Orthopedics Foundation and the American Academy of Physical Medicine and Rehabilitation.


When not working, he loves spending time with his daughters and wife and serves as the pitching coach for a local high school baseball team.

Kirk Wersland, DC

Dr. Kirk R Wersland is a Bountiful, Utah based chiropractor with 18 years of experience in General Chiropractor.
Dr. Kirk R Wersland is qualified as a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.