title: No diurnal variations in calcitonin and vitamin D2.
mesh_terms: D000328:Adult; D002116:Calcitonin / Q000097:blood*; D002940:Circadian Rhythm; D004872:Ergocalciferols / Q000097:blood*; D006801:Humans
chemical_list: D004872:Ergocalciferols; D002116:Calcitonin