R Medicine 4 RK1-715 Dentistry 4 TX341-641 Nutrition. Foods and food supply 4 RM Therapeutics. Pharmacology 3 P1-1091 Philology. Linguistics(General) 2 R5-920 Medicine (General) 2 RA643-645 Disease (Communicable and noninfectious) and public health 2 RC254-282 Neoplasms. Tumors. Oncology (including Cancer) 2 GF1-900 Human ecology. Anthropogeography 1 Q Science (General) 1 QH301 Biology 1 QR180-189.5 Immunology 1 R Medicine (General) 1 R735-854 Medical education. Medical schools. Research 1 RA Public aspects of medicine 1 RC Internal medicine 1 RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry 1 RC799-869 Diseases of the digestive system. Gastroenterology 1 RD Surgery 1 RD520-599.5 Surgery by region, system, or organ 1 RE Ophthalmology 1 RK Dentistry 1 RS Pharmacy and materia medica 1 RS1-441 Pharmacy and materia medica 1 TA1-2040 Engineering (General). Civil engineering (General) 1