Preoperative serum placenta growth factor level as a new marker for stage II or III colorectal cancer patients - KEMİK, Özgür; Sarbay Kemik, Ahu; SÜMER, Aziz; PURİSA, Sevim; TÜKENMEZ, Barış; TÜZÜN, Sefa (Turkish Journal of Gastroenterology, 2012)