Health condition of seamen of ocean-going transport vessels.
D000328:Adult; D002318:Cardiovascular Diseases / Q000453:epidemiology; D005767:Gastrointestinal Diseases / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009326:Naval Medicine; D009497:Neurotic Disorders / Q000453:epidemiology; D011044:Poland; D012767:Ships