R General Medicine
RA Public Aspects of Medicine
RB Pathology
RA Internal Medicine
RD Surgery
RE Opthalmology
RF Ear, Nose and Throat
RG Gynecology, Obstetrics
RJ Pediatrics
RK Dentistry
RL Dermatology
RM Therapeutics, Pharmacology
RS Pharmacy
RT Nursing
RV Botanic, Eclectic Medicine
RX Homeopathy
RZ Chiropractic, Osteopathy, Mental Healing