title: Vitamin B1, B2, B6 and C status in the elderly.
mesh_terms: D000368:Aged; D001206:Ascorbic Acid Deficiency / Q000175:diagnosis*; D006801:Humans; D012257:Riboflavin Deficiency / Q000175:diagnosis*; D013832:Thiamine Deficiency / Q000175:diagnosis*; D026681:Vitamin B 6 Deficiency / Q000175:diagnosis*