1. Clinical and Enteric Neuroscience Translational and Epidemiological Research Program (C.E.N.T.E.R.); Mayo Clinic; Rochester MN USA
2. Division of Gastroenterology; University of Calgary; Calgary AB Canada
3. Department of Neurology; Mayo Clinic; Rochester MN USA
4. Division of Biostatistics; Department of Health Sciences Research; Mayo Clinic; Rochester MN USA