--headings beginning with the word Drug; also individual drugs and groups of drugs, e.g. Narcotics; also subdivision Therapeutic use under individual chemicals and groups of chemicals, e.g. Copper--Therapeutic use; Insulin--Therapeutic use; and subdivision Drug use under names of individual persons and under classes of persons and ethnic groups
--particular instruments and apparatus, e.g. Hypodermic needles, Tilt table; also subdivision Apparatus and instruments under special branches of medicine, e.g. Dermatology--Apparatus and instruments
