Comparison of patterns of laxative ingestion to improve bowel preparation for colonoscopy: a pilot randomized clinical trial* oleh Adeyinka O. Laiyemo, Kolapo A. Idowu, Clinton Burnside, Carla D. Williams, Momodu Jack, Getachew Mekasha, Hassan Ashktorab, Hassan Brim, Edward L. Lee, Andrew K. Sanderson, Angesom Kibreab, John Kwagyan