TY - JOUR T1 - New concepts in screening JF - British Journal of General Practice JO - Br J Gen Pract SP - 705 LP - 705 VL - 54 IS - 506 AU - William House AU - David Peters Y1 - 2004/09/01 UR - http://bjgp.org/content/54/506/705.1.abstract N2 - Dr Muir Gray's account of screening ignores possible harmful effects of screening healthy people.1 Some of these are obvious, such as the example he cites of perforation of the bowel during colonoscopy. Others are much harder to recognise. For instance, it is difficult to believe that … ER -