title: Drug surveillance. Problems and challenges.
mesh_terms: D000328:Adult; D001855:Bone Marrow Diseases / Q000139:chemically induced; D002648:Child; D002675:Child, Preschool; D064420:Drug-Related Side Effects and Adverse Reactions; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009732:Nursing Care; D010372:Pediatrics; D010607:Pharmacy Service, Hospital; D011159:Population Surveillance; D011446:Prospective Studies; D012189:Retrospective Studies