Vitamin A deficiency as a public health problem & assessment methods.
National Eye Institute, NIH Bethesda, Maryland.
B A
BA
Underwood
D017691:Caribbean Region / Q000453:epidemiology; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D003623:Dark Adaptation; D004435:Eating; D006801:Humans; D007843:Latin America / Q000453:epidemiology; D011634:Public Health; D014801:Vitamin A / Q000097:blood; D014802:Vitamin A Deficiency / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology*
D014801:Vitamin A