A novel quantitative trait locus controlling fetal haemoglobin on chromosome 2p15 by Menzel, S, Garner, C, Gut, I, Matsuda, F, Yamaguchi, M, Heath, S, Foglio, M, Zelenka, D, Boland, A, Rooks, H, Best, S, Spector, T, Farrall, M, Lathrop, M, Thein, S