1. School of Nursing, Duke University, Durham, NC, USA
2. Division of Gastroenterology, Duke University School of Medicine, Durham, NC, USA
3. Human Service Systems, Chapel Hill, NC, USA
4. Baker Center for Primary Care, Linville, NC, USA
5. RMG Gastroenterology, Raleigh, NC, USA
6. University of North Carolina–Chapel Hill, School of Nursing, Chapel Hill, NC, USA