Search results
Best Practice & Research Clinical Gastroenterology > 2011 > 25 > 1 > 3-18
Journal of Clinical Epidemiology > 1995 > 48 > 10 > 1277-1283
Best Practice & Research Clinical Gastroenterology > 2011 > 25 > 1 > 3-18
Journal of Clinical Epidemiology > 1995 > 48 > 10 > 1277-1283