TY  - JOUR 
T1  - Association of Surfactant-Associated Protein D Gene Polymorphisms with the Risk of COPD: a Meta-Analysis
JO  - Clinics
A1  - Liao, Yi
A1  - Huang, ChengLiang
A1  - Wang, JianRong
A1  - Fan, XianMing
SN  - 1807-5932
UL  - 10.6061/clinics/2019/e855
VL  - 74 
Y1  - 2019
PB  - Brasil 
ER  -