Heiß, Lena; Neitzert, Saskia; Hansen, Ernil; Nowak, Hartmuth; Neitzert, Renate; Saller, Thomas (2025): Positive suggestions via headphones during general anesthesia for the improvement of vegetative & cognitive postoperative course parameters in elderly orthopedic patients – a randomized controlled double-blinded trial (POSSUDEL). Trials, 26: 444. ISSN 1745-6215