Wits University Prof. Steve Tollman (IMAGE) University of the Witwatersrand Caption Wits University Prof. Steve Tollman is a commissioner and co-author of research published by the UCL-Lancet Commission on Migration and Health on 5 December 2018. Credit Wits University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.