Hirschsprung disease and L1CAM: is the disturbed sex ratio caused by L1CAM mutations?. Issue 3 (1st March 2002) - Hofstra, R M W; Elfferich, P; Osinga, J; Verlind, E; Fransen, E; López Pisón, J; de Die-Smulders, C E M; Stolte-Dijkstra, I; Buys, C H C M