@misc{indiciaeda6bc0db2781, title = {Progress in establishing human trace element requirements: selenium, zinc, and copper.}, author = {O A Levander}, year = {1986}, doi = {10.1111/j.1600-0773.1986.tb02715.x}, url = {https://pubmed.ncbi.nlm.nih.gov/3776644/}, note = {Source identifier: 3776644} }