1 Commentary: A Brief Review on Health Risk Assessment of Nickel, Hexavalent Chromium and Lead – Role of Heavy Metals in Cellular Hypoxia Kusal K Das * and Salim A.Dhundasi Environmental Health Research Unit, Department of Physiology, Al Ameen Medical College, Bijapur 586108 Karnataka, India All correspondence to: * Kusal K.Das Professor Environmental Health Research Unit Department of Physiology Al Ameen Medical College Bijapur-586108 Karnataka,India Tel: (W): 91-8352-272502 (R) : 91-8352-271257 FAX: 91-8352-272502 Email: kusaldas@yahoo.com