Integrity

Our treatment of data, confidentiality, and commitment to the scientific community is unassailable

Scientific Rigor

We follow the highest standards of scientific research, statistical analysis, and disclosure practices.

Patient Focus

The care and well being of patients who will benefit through pain relief and improved quality of life are the focus of our research and educational programs.

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Joanna Zeiger, MS, PhD
Founder, CEO

Joanna Zeiger, MS, PhD, is an epidemiologist with a strong background in study design and biostatistics, particularly questionnaire-based outcomes studies. Joanna’s studies took her to Brown University (BA) and Northwestern University (MS). She did her doctoral and post-doctoral work at the Johns Hopkins Bloomberg School of Public Health with a focus on gene-environment interactions in the etiology of birth defects. Upon moving to Colorado in 2003, Dr. Zeiger spent eight years at the Institute for Behavioral Genetics at the University of Colorado Boulder studying drug use and abuse in adolescents; her particular interest was on initial subjective effects to drugs and how they affect long term usage. In 2016, Dr. Joanna was the PI of The Sisu Study which examined mental toughness latent classes in 1250 athletes. The Athlete PEACE Survey, a study for which Dr. Joanna Zeiger was the PI, was completed in late 2018. This study examined cannabis use in athletes. In 2017, The Champion Mindset: An Athlete’s Guide to Mental Toughness was published by St. Martin’s Press. A 2009 bike accident left Dr. Joanna Zeiger, an Olympian and former World Champion in triathlon, with severe chronic pain for which she started using cannabis to mitigate symptoms and to aid with sleep. Learning more about cannabis and its medicinal possibilities, particularly in the climate of the opioid crisis, has driven Dr. Joanna Zeiger’s interest to study the plant; her emphasis is on patient outcomes and finding ways to improve the lives of those who suffer with pain.

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Robert Zeiger, MD, PhD
Chief Medical Officer

Robert S. Zeiger, MD, PhD, has been Senior Physician Investigator and Director of Allergy Research for Kaiser Permanente Southern California (KPSC), San Diego, California, Clinical Professor of Pediatrics at the University of California San Diego (UCSD) School of Medicine in La Jolla, California, and Deputy Editor for the Journal of Allergy Clinical Immunology: In Practice. He is Board Certified in Pediatrics and Allergy. Dr. Robert Zeiger was Principal Investigator (PI) for the UCSD/KPSC Clinical Center for the multicenter National Health Lung Blood Institute (NHLB)I sponsored Childhood Asthma Management Program (CAMP) and Childhood Asthma Research and Education (CARE) Network. He is presently PI for the KPSC Clinical Center for the NHLBI funded Vitamin D Antenatal Asthma Reduction Trial (VDAART). He has recently explored the power of administrative data obtained from large computerized electronic pharmacy and healthcare databases to perform outcome studies on severe asthma, the clinical and cost burden of asthma and chronic obstructive pulmonary disease (COPD), chronic cough, and to conduct innovative clinical trials. “Given the disastrous and troubling opioid epidemic, the high prevalence of unrelenting chronic pain, and the lack of highly effective and safe treatments for chronic pain, there is a major public health need for novel effective medications. More definitive research needs to better understand the current use of cannabis for pain in the United States and to provide future evidence through rigorous clinical trials on the role of cannabis in the treatment of chronic pain, inflammatory conditions, and other chronic conditions.”

William Silvers
William Silvers, MD
Chief Scientific Officer

William S. Silvers, M.D. Clinical Professor of Medicine at University of Colorado School of Medicine, Division of Allergy Clinical Immunology. Faculty affiliate of the CU Center for Bioethics and Humanities. MD at Indiana University School of Medicine. Internship and residency at Emory University/Grady Memorial Hospital, Atlanta. Dr. Silvers did his Fellowship at the National Jewish Medical and Research Center, Denver, then spent the next year doing research and starting an allergy clinic at the Hadassah Medical Center in Jerusalem. He was past president of the Colorado Allergy & Asthma Society, and past medical director of the Colorado Children’s Asthma “Champ Camp” and Medical Director for Asthma Ski Day. Chaired the Sports Medicine committee of the ACAAI and the World Allergy Organization, and helped found the Integrative Medicine committees of the ACAAI and AAAAI. Listed in 5280 “Denver’s Top Doctors” for multiple years. Dr. Silvers retired from private practice after 35 years. Scientific interests include Integrative Approaches to allergies and asthma, exercise induced allergies, and “The Skier’s Nose” – cold induced rhinitis. Since the legalization of medical and recreational marijuana in Colorado, he has published and spoken on its allergic immunologic correlates.

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Edward Fleegler, MD
Scientific Advisory Board

Edward M. Fleegler, MD, FACP, is a Board Certified-Internist who had dual certification in Geriatrics. He worked with the Mariott Corporation’s Senior Living Division as the Medical Director of The Quadrangle (Mariott flagship CCRC) located in Haverford, Pennsylvania. He was a member of the clinical faculty of The University of Pennsylvania Healthcare system until 2000. Dr. Fleegler left clinical practice in 2000, after 25+ years. He was a member of the founding group of Carekinesis which is now a part of Tabula Rasa Healthcare. Dr. Fleegler remains interested in geriatric syndromes and end-of-life medical care issues. He feels that outcomes research with cannabis as part of a multimodal intervention for pain syndromes among the elderly is important given that 25-50% of community-dwelling older adults and 45-80% of nursing-home residents have substantial pain on a daily basis., FACP, is a Board Certified-Internist who also had dual certification in Geriatrics when a clinically practicing Internist/Geriatrician. He worked with the Mariott Corporation’s Senior Living Division as the Medical Director of The Quadrangle (Mariott flagship CCRC) located in Haverford, Pennsylvania. During his clinical years in medical practice, he was a member of the clinical faculty of The University of Pennsylvania Healthcare system until 2000. He was a member of the founding group of Carekinesis which is now a part of Tabula Rasa Healthcare. Dr. Fleegler feels that outcomes research with cannabis as part of a multimodal intervention for pain syndromes among the elderly is important given that older adults and nursing-home residents have substantial pain on a daily basis.