Palm NM, Vallabhajosyula S, Chen A, Lam SW, Weister TJ, Kashani K, Naylor D, Khanna AK. Timing of resumption of beta-blockers after discontinuation of vasopressors is not associated with post-operative atrial fibrillation in critically ill patients recovering from non-cardiac surgery: A retrospective cohort analysis. J Crit Care. 2020 12; 60:177-182.