Osadolor B, Ezegbogu MO. Toxicity of Vanadium, Cadmium, Chromium and Iron on the Kidney Status of Occupational Photocopier Operators at the University of Benin, Benin-City, Nigeria- A Pilot Study. NIJOPHASR [Internet]. 2020 Jul. 30 [cited 2024 Nov. 24];4(1):20-4. Available from: http://mail.nijophasr.net/index.php/nijophasr/article/view/69