TY - RPRT TI - Colonoscopy practice patterns since introduction of medicare coverage for average-risk screening. AU - Gavin C Harewood AU - David A Lieberman PY - 2004 DO - 10.1016/s1542-3565(03)00294-5 UR - https://pubmed.ncbi.nlm.nih.gov/15017635/ ID - 15017635 ER -