00431nas a2200181   4500000000100000000000100001008004100002100001300043700001400056700002000070700001400090700001800104700001300122245006300135300001100198490000800209022003200217       2004                            d1 aJ. Lewis1 aF. Aberra1 aG. Lichtenstein1 aW. Bilker1 aC. Brensinger1 aB. Strom00aSeasonal variation in flares of inflammatory bowel disease  a665-730 v126  a0016-5085 (Print) 0016-5085