Vitamin D deficiency--it's more than rickets.
Greer
Frank R
FR
D000413:Alaska / Q000453:epidemiology; D001942:Breast Feeding; D006801:Humans; D007223:Infant; D012279:Rickets / Q000453:epidemiology; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000453:epidemiology*
D014807:Vitamin D; C104450:25-hydroxyvitamin D