1Section of Gastroenterology, Department of Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania, USA
Correspondence: Ron Schey, MD, FACG, Neurogastroenterology and Esophageal Disorders Program, Temple University Physicians/Section of Gastroenterology, 3401 North Broad Street, 8th Floor Parkinson Pavilion, Philadelphia, Pennsylvania 19140, USA. E-mail: [email protected]
2These authors contributed equally to this work
Received 29 October 2014; accepted 10 February 2015
Guarantor of the article: Ron Schey, MD, FACG.
Specific author contributions: Grace H. Shin and Erin L. Toto: review of previous and current information, drafting of manuscript, and critical revision of the manuscript for important intellectual content. Ron Schey: review of previous and current information, drafting of the manuscript, critical revision of the manuscript for important intellectual content, review supervision, and guarantor for submission.
Financial support: None.
Potential competing interests: None.
