TY  - JOUR 
T1  - Nitrous oxide as an adjunctive therapy in major depressive disorder: a randomized controlled double-blind pilot trial
JO  - Brazilian Journal of Psychiatry
A1  - Guimarães, Mara C.
A1  - Guimarães, Tiago M.
A1  - Hallak, Jaime E.
A1  - Abrão, João
A1  - Machado-de-Sousa, João P.
SN  - 1516-4446
UL  - 10.1590/1516-4446-2020-1543
VL  - 43 
Y1  - 2021
PB  - Brasil 
ER  -