High-speed trains versus air transport vectors for mass transfers of critically ill patients: The TRANSCOV cohort study - Chatpimuk Thipayamaskomon; Olivier Grimaud; Pierre Tattevin; Lionel Lamhaut; Emmanuelle Leray; Noemie Letellier; Sahar Bayat; Christophe Fermanian; Sylvie Martin; Jean-Marc Philippe; Eric Maury; Marc Noizet; et al. (PLoS ONE, 2026)