title: Clinical signs of early vitamin deficiency in British seamen.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D001361:Avitaminosis / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009326:Naval Medicine; D014060:Tongue Diseases / Q000209:etiology; D006113:United Kingdom; D014804:Vitamin B Deficiency / Q000175:diagnosis / Q000453:epidemiology