Small sample size of regional anesthesia RCTs comparing novel block to placebo is a rational outcome of trial design. Feasibly large trials are unlikely to change conclusions regarding block vs. placebo comparisons.
幸市 上地健悟 嘉数こういち うえちけんご かかずKoichi UechiKengo Kakazu沖縄大学客員教授沖縄大学人文学部福祉文化学科准教授