Funding
This study is funded by the institutional budget and partly by Fisher & Paykel Healthcare Ltd., Auckland, New Zealand.The equipment for nasal high flow was provided by Fisher & Paykel Healthcare Ltd., Auckland, New Zealand.This study is funded by the institutional budget and partly supported by Fisher & Paykel Healthcare Ltd., Auckland, New Zealand.M.I.P. and S.T. are employees of Fisher & Paykel Healthcare Ltd., the manufacturers of the nasal high flow (NHF) devices used in the study. T.A. has received funding and support from Fisher & Paykel Healthcare Ltd.The study is sponsored by the Nagasaki University Graduate School of Biomedical Sciences. (The sponsor’s representative is Dr. Ayuse; tel.: + 81–95-819–7713; email: ayuse@nagasaki-u.ac.jp.)