Airflows around oxygen masks. David S. Hui et al. Chest 2006;130: 822-826
http://www.chestjournal.org/cgi/content/full/130/3/822
Oxygen administration and the protection of healthcare workers from infections. Joseph A. Fisher. Chest 2007;131: 941-42
http://www.chestjournal.org/cgi/content/full/131/3/941
Exhaled air dispersion during oxygen delivery via a simple oxygen mask. David S. Hui. Chest 2007; 132: 540-46
http://www.chestjournal.org/cgi/content/abstract/132/2/540
