title: Stimulation by artificial lighting of calcium absorption in elderly human subjects.
mesh_terms: D000368:Aged; D002118:Calcium / Q000378:metabolism*; D002127:Calcium Isotopes; D005243:Feces / Q000032:analysis; D006801:Humans; D007408:Intestinal Absorption / Q000528:radiation effects*; D008027:Light; D008029:Lighting; D008297:Male; D008875:Middle Aged; D011830:Radiation Effects; D012621:Seasons; D013472:Sunlight; D014807:Vitamin D / Q000008:administration & dosage
chemical_list: D002127:Calcium Isotopes; D014807:Vitamin D; D002118:Calcium