title: A study of the medical causes of absence from duty aboard South African merchant ships.
mesh_terms: D000041:Absenteeism; D000059:Accidents; D001064:Appendicitis / Q000453:epidemiology; D001249:Asthma / Q000453:epidemiology; D003327:Coronary Disease / Q000453:epidemiology; D050723:Fractures, Bone / Q000453:epidemiology; D006230:Hand Injuries / Q000453:epidemiology; D006552:Hernia, Inguinal / Q000453:epidemiology; D006760:Hospitalization; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology; D009326:Naval Medicine; D010437:Peptic Ulcer / Q000453:epidemiology; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D012749:Sexually Transmitted Diseases / Q000453:epidemiology; D012871:Skin Diseases / Q000453:epidemiology