OPEN BMJ open | 24 Apr 2015
CR MacIntyre, H Seale, TC Dung, NT Hien, PT Nga, AA Chughtai, B Rahman, DE Dwyer and Q Wang
The aim of this study was to compare the efficacy of cloth masks to medical masks in hospital healthcare workers (HCWs). The null hypothesis is that there is no difference between medical masks and cloth masks.
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