1 Department of Research & Evaluation, Kaiser Permanente Southern California, Pasadena, California; Department of Population and Public Health Sciences, Keck School of Medicine of USC, Los Angeles, California.
2 Department of Research & Evaluation, Kaiser Permanente Southern California, Pasadena, California.
3 Center for Pancreatic Care, Division of Gastroenterology, Kaiser Permanente, Los Angeles, California.
4 Department of Population and Public Health Sciences, Keck School of Medicine of USC, Los Angeles, California; Norris Comprehensive Cancer Center, Los Angeles, California.
5 Department of Population and Public Health Sciences, Keck School of Medicine of USC, Los Angeles, California.
6 Department of Research & Evaluation, Kaiser Permanente Southern California, Pasadena, California. Electronic address: anny.h.xiang@kp.org.