title: Proceedings: Seasonal variations in serum calcium concentration.
mesh_terms: D000328:Adult; D002118:Calcium / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010710:Phosphates / Q000097:blood*; D012621:Seasons
chemical_list: D010710:Phosphates; D002118:Calcium