Placebo Rates in Randomized Controlled Trials of Proctitis Therapy: A Systematic Review and Meta-Analysis Placebo Response in Proctitis. - Silva, Theshani A De; Alphonsus, Lotus; Ma, Christopher; Hogan, Malcolm; Sedano, Rocio; Narula, Neeraj; Danese, Silvio; Peyrin-Biroulet, Laurent; MacDonald, John K; Singh, Siddharth; Jairath, Vipul (Journal of Crohn's & Colitis, 2023)