Genetic testing in hereditary non-polyposis colorectal cancer families with a MSH2, MLH1, or MSH6 mutation. Issue 11 (1st November 2002) - Wagner, A; Tops, C; Wijnen, J T; Zwinderman, K; van der Meer, C; Kets, M; Niermeijer, M F; Klijn, J G M; Tibben, A; Vasen, H F A; Meijers-Heijboer, H