International variations in clinical practice guidelines for palliative sedation: a systematic review
Ebun Abarshi, Judith Rietjens, Lenzo Robijn, Augusto Caraceni, Sheila Payne, Luc Deliens, Lieve Van den Block
BMJ Supportive & Palliative Care Sep 2017, 7 (3) 223-229; DOI: 10.1136/bmjspcare-2016-001159