UK Joint Advisory Group consensus statements for training and certification in endoscopic retrograde cholangiopancreatography - Siau, Keith; Keane, Margaret G; Steed, Helen; Caddy, Grant; Church, Nick; Martin, Harry; McCrudden, Raymond; Neville, Peter; Oppong, Kofi; Paranandi, Bharat; Rasheed, Ashraf; Sturgess, Richard; Hawkes, Neil D; Webster, George; Johnson, Gavin; on behalf of the Joint Advisory Group on Gastrointestinal Endoscopy (JAG) (Endoscopy International Open, 2022)