Non-Adrenergic Vasopressors in Patients with or at Risk for Vasodilatory Shock. A Systematic Review and Meta-Analysis of Randomized Trials - Belletti, Alessandro; Musu, Mario; Silvetti, Simona; Saleh, Omar; Pasin, Laura; Monaco, Fabrizio; Hajjar, Ludhmila A.; Fominskiy, Evgeny; Finco, Gabriele; Zangrillo, Alberto; Landoni, Giovanni (PLOS ONE, 2015)