The exceptional physicians and screening conduct specialists who make up the participant screening team at MDS Pharma Services all share the same vision: a commitment to providing the highest quality care and the best quality of stay for participants.

As a participant, you are our partner in the clinical trial process and that relationship is at the core of our approach to research and health care.


Dr. Mark Allison, MD
Dr. Allison earned his medical degree from the University of Nebraska Medical Center, then completed his family practice residency at the Lincoln Medical Education Foundation, in affiliation with the University of Nebraska Medical Center. He was in private practice for 21 years before joining MDS. Certified Physician Investigator, Association of Clinical Research Professionals.

Dr. Scott Sharples, MD
Dr. Sharples earned his medical degree from Baylor College of Medicine in Houston, TX. He then completed his family practice residency at Memorial Family Practice Residency Program in Houston, TX. He was in private practice in Pearland, TX, for four years before joining MDS. He is board-certified in Family Practice.

Dr. Dennis Swearingen, MD
Dr. Swearingen received his medical degree from Loyola University of Chicago Stritch School of Medicine, then completed a family residency at Mayo Clinic in Scottsdale, Arizona. Certified Physician Investigator, Association of Clinical Research Professionals.