Randomized study of sunshine exposure and serum 25-OHD in breast-fed infants in Beijing, China.
D001942:Breast Feeding; D002681:China; D005260:Female; D006801:Humans; D006887:Hydroxycholecalciferols / Q000097:blood*; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011446:Prospective Studies; D011897:Random Allocation; D012279:Rickets / Q000453:epidemiology / Q000209:etiology; D013472:Sunlight
D006887:Hydroxycholecalciferols