Thomas Perls, MD, MPHProfessor of Medicine, MED/Geriatrics Websites: HGH Watch Living to 100 Life Expectancy Calculator New England Centenarian Study Boston Medical Center Physician Provider Profile Departments & ProgramsMedicineResearch FieldsGenetics & Genomics, Human Physiology & Aging, Proteomics & Glycomics, and Stem Cell & Regenerative Medicine View all profiles