Response

Affiliations

• ¹ Department of Medicine, Stanford University School of Medicine, Stanford, California, USA.
• ² Institute for Digestive Research, Soonchunhyang University College of Medicine, Seoul, South Korea.
• ³ Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
• ⁴ Department of Gastroenterology, Stanford University School of Medicine, Stanford, California, USA; VA Palo Alto Health Care System, Palo Alto, California, USA.