Independent prognostic value of preoperative serum markers CA 242, specific tissue polypeptide antigen and human chorionic gonadotrophin beta, but not of carcinoembryonic antigen or tissue polypeptide antigen in colorectal cancer. - Carpelan-Holmstrom,M.; Haglund,C.; Lundin,J.; Alfthan,H. (Br J Cancer, 1996)