TY - GEN AU - Tekkis,Paris P TI - Met-analyses SN - 0012-3706 PY - 2003///1002 KW - Colorectal Surgery KW - Digestive System Surgical Procedures KW - adverse effects KW - Elective Surgical Procedures KW - Humans KW - Meta-Analysis as Topic KW - Preoperative Care KW - methods N1 - Publication Type: Comment; Letter ER -