¹Service of Digestive Diseases, University Clinic Hospital Lozano Blesa, University of Zaragoza, IIS Aragón, CIBERehd, Zaragoza, Spain

Correspondence: Angel Lanas, MD, PhD, Service of Digestive Diseases, University Clinic Hospital Lozano Blesa, 50009, Zaragoza, Spain. E-mail: [email protected]

Guarantor of the article: Angel Lanas, MD, PhD.

Financial support: None.

Potential competing interests: Lanas and his institution have received investigator-initiated grants from Bayer Pharma AG.