European Society of Gastrointestinal Endoscopy (ESGE) curricula development for postgraduate training in advanced endoscopic procedures: rationale and methodology - Bisschops, Raf; Dekker, Evelien; East, James E.; Johnson, Gavin; Pimentel-Nunes, Pedro; Sanders, David S.; Dinis-Ribeiro, Mario; Ponchon, Thierry (Endoscopy, 2019)