Effects of s-ketamine and midazolam on respiratory variability: A randomized controlled pilot trial. - van den Bosch, Oscar F. C.; van Lennep, Johan P. A.; Alvarez-Jimenez, Ricardo; van Middendorp, Henriët; Evers, Andrea W. M.; Steegers, Monique A. H.; Schober, Patrick; Loer, Stephan A. (PLoS ONE, 2025)