TY  - JOUR 
T1  - Volume 77 issue 1 - jan/feb 2011
JO  - Brazilian Journal of Otorhinolaryngology
SN  - 1808-8694
UL  - 10.1590/S1808-86942011000300025
VL  - 77 
Y1  - 2011
PB  - Brazil 
ER  -