Chase Medical Research, LLC We are led by Joseph Soufer, MD, who specializes in Internal Medicine with a sub-specialty of Endocrinology. We are affiliated with area specialists in neurology, psychology, rheumatology, gastroenterology and obstetrics and gynecology. Studies have been conducted in the therapeutic areas of women’s health, endocrinology, cardiovascular, central nervous system, rheumatology, men’s health and metabolic disorders.