Risk factors for prolonged mechanical ventilation in critically ill patients with influenza-related acute respiratory distress syndrome.

"Declarations Ethics approval and consent to participateThe study protocol was approved by the Institutional Review Boards of all eight hospitals (Taipei Veterans General Hospital, 2016-05-020CC; Taichung Veterans General Hospital, CE16093A; Tri-Service General Hospital, 1-105- 05-086; National Taiwan University Hospital, 201605036RIND; Chang Gung Memorial Hospital, 201600988B0; China Medical University Hospital, 105-REC2-053(FR); Kaohsiung Medical University Hospital, KUMHIRB-E(I)- 20170097; and Kaohsiung Chang Gung Memorial Hospital, 201600988B0. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This research was funded by grants from Taipei Veterans General Hospital (V111B-024, V112B-031, V112C-068, V112D65-003-MY2-1), and National Science and Technology Council (Taiwan) (NSTC 112-2314-B-A49-040, NSTC 112-2314-B-075-050). This work was supported by grants from the Ministry of Education, Higher Education SPROUT Project for Cancer Progression Research Center (111W31101) and Cancer and Immunology Research Center (112W31101)."