Letter: On nutrition of migrant workers.
D000382:Agricultural Workers' Diseases / Q000209:etiology*; D002800:Cholinesterase Inhibitors / Q000506:poisoning; D006801:Humans; D009747:Nutritional Physiological Phenomena; D014171:Transients and Migrants; D014801:Vitamin A / Q000378:metabolism
D002800:Cholinesterase Inhibitors; D014801:Vitamin A