TY  - JOUR
AU  - Cheung, Felix
TI  - Public health: Wear a mask and wash your hands
JA  - 
PY  - 2009/12/02/print
VL  - 
PB  - Nature Publishing Group
UR  - http://dx.doi.org/10.1038/nchina.2009.230
M3  - 10.1038/nchina.2009.230
N1  - 10.1038/nchina.2009.230
ER  -