HLA class II haplotypes in primary sclerosing cholangitis patients from five European populations. by Spurkland, A, Saarinen, S, Boberg, K, Mitchell, S, Broome, U, Caballeria, L, Ciusani, E, Chapman, R, Ercilla, G, Fausa, O, Knutsen, I, Pares, A, Rosina, F, Olerup, O, Thorsby, E, Schrumpf, E