Review
The use of masks and respirators to prevent transmission of influenza: a systematic review of the scientific evidence.
Influenza Other Respi Viruses. 2012 Jul 1;6(4):257-67.
Comparative Study
Simulated workplace protection factors for half-facepiece respiratory protective devices.
J Occup Environ Hyg. 2007 Jun 1;4(6):420-31.
Randomized Controlled Trial
A randomized clinical trial of three options for N95 respirators and medical masks in health workers.
Am. J. Respir. Crit. Care Med.. 2013 May 1;187(9):960-6.