Genetic susceptibility to tuberculosis in Africans: a genome-wide scan. by Bellamy, R, Beyers, N, McAdam, K, Ruwende, C, Gie, R, Samaai, P, Bester, D, Meyer, M, Corrah, T, Collin, M, Camidge, DR, Wilkinson, D, Hoal-Van Helden, E, Whittle, H, Amos, W, van Helden, P, Hill, A