00397nas a2200169   4500000000100000000000100001008004100002100001400043700001600057700001800073700002000091700001300111245007200124300001100196490000600207022001400213       2007                            d1 aF. Aberra1 aN. Stettler1 aC. Brensinger1 aG. Lichtenstein1 aJ. Lewis00aRisk for active tuberculosis in inflammatory bowel disease patients  a1070-50 v5  a1542-3565