title: Correspondence section: Regression lines and correlations.
mesh_terms: D000818:Animals; D002645:Chickens; D002762:Cholecalciferol / Q000378:metabolism; D006887:Hydroxycholecalciferols / Q000378:metabolism; D008722:Methods; D012044:Regression Analysis; D013223:Statistics as Topic
chemical_list: D006887:Hydroxycholecalciferols; D002762:Cholecalciferol