RT Journal Article SR Electronic T1 Proposal of a clinical approach to perioperative visceral pain JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2021-103071 DO 10.1136/rapm-2021-103071 A1 Andres Rocha-Romero A1 Maria Ascensio-Mercado A1 Ece Yamak Altinpulluk A1 Pablo Oliver-Fornies A1 Karla Espinoza A1 Carlos Salazar A1 Marilina Susana Olea A1 Nelson Roque-Gómez A1 Ana Sofia Teles A1 Ricardo Aguilar-Ureña A1 Mario Fajardo Perez YR 2021 UL http://rapm.bmj.com/content/early/2021/10/04/rapm-2021-103071.abstract AB