Blood manganese concentrations among first-grade school children in two South African cities Authors: R�llin HB, Mathee A, Levin J, Theodorou P, Wewers F. Source: Environmental Research. 2005;97(1):93-9. Babalwa Jekwa2019-03-22T23:23:43+02:00Dec 31st, 2005| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail