title: Progress in establishing human trace element requirements: selenium, zinc, and copper.
mesh_terms: D003300:Copper / Q000502:physiology*; D006706:Homeostasis; D006801:Humans; D009747:Nutritional Physiological Phenomena; D012643:Selenium / Q000502:physiology*; D015032:Zinc / Q000502:physiology*
chemical_list: D003300:Copper; D012643:Selenium; D015032:Zinc