Blood transfusion has no effect on colorectal cancer survival. A population-based study. - Garau,I.; Benito,E.; Bosch,F.X.; Bargay,J.; Obrador,A.; Santamaria,J.; Antich,J.L.; Besalduch,J.; Rifa,J.; Teuchmann,S. (Eur J Cancer, 1994)