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C. A. Varga, The Forgotten Fifty Per Cent: A Review of Sexual and Reproductive Health Research and Programs Focused on Boys and Young Men in Sub-Saharan Africa, African Journal of Reproductive Health / La Revue Africaine de la Santé Reproductive, Vol. 5, No. 3 (Dec., 2001), pp. 175-195
Christine Varga (Sat,) studied this question.