title: Plasma iron and copper in laying hens.
mesh_terms: D000818:Animals; D002645:Chickens / Q000097:blood*; D003300:Copper / Q000097:blood*; D004529:Egg White / Q000032:analysis; D004530:Egg Yolk / Q000032:analysis; D005069:Evaluation Studies as Topic; D005260:Female; D007501:Iron / Q000097:blood*; D010060:Ovulation
chemical_list: D003300:Copper; D007501:Iron