A survey of sea diseases on South African ships.
D000041:Absenteeism; D000059:Accidents; D001847:Bone Diseases / Q000453:epidemiology; D005128:Eye Diseases / Q000453:epidemiology; D005767:Gastrointestinal Diseases / Q000453:epidemiology; D006801:Humans; D008297:Male; D009017:Morbidity; D009059:Mouth Diseases / Q000453:epidemiology; D009135:Muscular Diseases / Q000453:epidemiology; D009326:Naval Medicine; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D012749:Sexually Transmitted Diseases / Q000453:epidemiology; D012767:Ships; D013019:South Africa