00369nam a2200157Ia 450000500170000000800410001702200080005802400100006602700140007605000170009007400120010724500460011926000170016526000230018226000060020520250523165331.0250508s9999    xx            000 0 und d  a264  qGCONA  q0889-8553  a01GCONA       a1000264 0aGastroenterology Clinics of North America  aPhiladelphia  bW.B. Saunders Co.,  c0