1. UNESCO-UNISA Africa Chair in Nanosciences and Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, P.O. Box 392, Pretoria 0002, South Africa
2. Nanosciences African Network (NANOAFNET), iThemba LABS−National Research Foundation, 1 Old Faure Road, Somerset West 7129, P.O. Box 722, Somerset West, Western Cape 7131, South Africa
3. Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad 9177948, Iran