Detection rate of colorectal cancer by routine colonoscopy is comparable in patients aged 45–49 and 50–54 years - Carla Ammann; Rina Maqkaj; Marcel Andre Schneider; Stefanie Josefine Hehl; Ralph Fritsch; Daniel Pohl; Gerhard Rogler; Christoph Gubler; Matthias Turina; Michael Scharl (Swiss Medical Weekly)