TY  - JOUR 
T1  - Why We Need to Use and which Mask Types are Effective against the Novel Coronavirus (COVID-19)?
JO  - International Archives of Otorhinolaryngology
A1  - Jotz, Geraldo Pereira
A1  - Bittencourt, Aline Gomes
SN  - 1809-4864
UL  - 10.1055/s-0040-1713588
VL  - 24 
Y1  - 2020
PB  - Brasil 
ER  -