Pre-Operative Risk Factors Contributing to Develop Surgical Site Infection After Elective and Emergent Colorectal Surgery oleh Zahra Kouhi, Arezou Hashemzadeh, Amirsina Sharifi, Seyed Mohsen Ahmadi Tafti, Amir Keshvari, Mohammad Sadegh Fazeli, Alireza Kazemeini, Mohammad Reza Keramati, Behnam Behboudi