Affiliation: | 1.Department of Medicine, Duke University, 2301 Erwin Road, Durham, NC, 27710, USA ;2.Division of Gastroenterology, Duke University School of Medicine, 200 Morris Street, Suite 6524, Durham, NC, 27705, USA ;3.Department of Biostatistics and Bioinformatics, Duke University, 2424 Erwin Road, Suite 802, Durham, NC, 27705, USA ;4.Duke Clinical Research Institute, 2424 Erwin Road, Suite 802, Durham, NC, 27705, USA ; |