title: Entero-gastric syndrome as an occupational hazard in merchant navy in Calcutta port.
mesh_terms: D005767:Gastrointestinal Diseases / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D007194:India; D008297:Male; D009326:Naval Medicine; D009784:Occupational Diseases / Q000453:epidemiology* / Q000517:prevention & control; D012767:Ships