TY  - JOUR 
T1  - Sequential battery of COVID-19 testing to maximize negative predictive value before surgeries
JO  - Revista do Colégio Brasileiro de Cirurgiões
A1  - SINHA, NEERAJ
A1  - BALAYLA, GALIT
SN  - 0100-6991
UL  - 10.1590/0100-6991e-20202634
VL  - 47 
Y1  - 2020
PB  - Brasil 
ER  -