Text and Data Mining valid from 2018-10-04
Received: 27 August 2018
Accepted: 26 September 2018
First Online: 4 October 2018
Compliance with ethical standards
: Tommaso Mauri received payment for lectures from Draeger Medical (unrelated to the present work). Alain Mercat declares no conflicts of interest. Giacomo Grasselli received payment for lectures from Getinge, Draeger Medical, Pfizer, and Fisher & Paykel, and travel-congress registration support from Getinge and Biotest (all unrelated to the present work).