Genome-wide association study of ulcerative colitis identifies three new susceptibility loci, including the HNF4A region. by Barrett, J, Lee, J, Lees, C, Prescott, N, Anderson, C, Phillips, A, Wesley, E, Parnell, K, Zhang, H, Drummond, H, Nimmo, E, Massey, D, Blaszczyk, K, Elliott, T, Cotterill, L, Dallal, H, Lobo, A, Mowat, C, Sanderson, J, Jewell, D, Newman, W, Edwards, C, Ahmad, T, Mansfield, J, Satsangi, J