1. Center for Evidence-based Medicine, Program in Public Health; Brown University; Providence RI USA
2. Center for Clinical Evidence Synthesis, Institute for Clinical Research and Health Policy Studies; Tufts Medical Center; Boston MA USA
3. Department of General Internal Medicine; Lahey Clinic Medical Center; Burlington MA USA
4. Department of Internal Medicine, Fujita Health University Nanakuri Sanatorium; Fujita Health University School of Medicine; Tsu Mie Japan
5. Clinical Research Center; National Hospital Organization Nagoya Medical Center; Nagoya Japan
6. Department of Internal Medicine; University of Ioannina School of Medicine; Ioannina Greece
7. Division of Gastroenterology & Hepatology, Department of Medicine; University of Colorado; Aurora CO USA
8. Department of Biostatistics, Program in Public Health; Brown University; Providence RI USA