4 (supplement) © 2012, The United Nations University Press[6] Retinol Assessment Among Women and Children in Sahelian Mobile Pastoralists. Authors: M. Bechir, E. Schelling, K. Kraemer, F. Schweigert, B. Bonfoh, L. Crump, M. Tanner, and J. Zinsstag - EcoHealth 9, 113–121, 2012 Quantification of Vitamin A in Palm Oil Using a Fast and Simple Portable Device: Method Validation and Comparison to High-Performance Liquid Chromatograph. Authors: F. Rohner, S. K. Frey, R. Mothes, A.Hurtienne, S. Hartong, P. Emery Bosso, M. Bui, Florian J. Schweigert, and C. Northrop-Clewes. - Int.