High-intensity versus low-intensity noninvasive positive pressure ventilation in patients with acute exacerbation of chronic obstructive pulmonary disease (HAPPEN): study protocol for a multicenter randomized controlled trial

Peer Review reports

Original Submission
6 Apr 2018	Submitted	Original manuscript
21 Jun 2018	Reviewed	Reviewer Report - Sebastian Ziemann
30 Jul 2018	Author responded	Author comments - Zujin Luo
Resubmission - Version 2
30 Jul 2018	Submitted	Manuscript version 2
14 Aug 2018	Reviewed	Reviewer Report - Dustin Krutsinger
27 Aug 2018	Reviewed	Reviewer Report - Roberta Meroni
18 Sep 2018	Author responded	Author comments - Zujin Luo
Resubmission - Version 3
18 Sep 2018	Submitted	Manuscript version 3
28 Sep 2018	Reviewed	Reviewer Report - Dustin Krutsinger
8 Oct 2018	Reviewed	Reviewer Report - Roberta Meroni
Resubmission - Version 4
	Submitted	Manuscript version 4
Publishing
16 Oct 2018	Editorially accepted
21 Nov 2018	Article published	10.1186/s13063-018-2991-y

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