Letter: Effect of vitamin C supplementation on Black mineworkers.
D000328:Adult; D000383:Agriculture; D001205:Ascorbic Acid; D004040:Dietary Carbohydrates; D006801:Humans; D008906:Mining; D009787:Occupational Medicine; D009909:Oral Health; D013019:South Africa
D004040:Dietary Carbohydrates; D001205:Ascorbic Acid