Use of different hospital data bases in the estimation of the relation between air pollution and chronic obstructive pulmonary disease.
J M
JM
Burrillo
F B
FB
Díez
S
S
Pérez-Hoyos
D000289:Admitting Department, Hospital / Q000706:statistics & numerical data*; D000397:Air Pollution / Q000009:adverse effects / Q000706:statistics & numerical data*; D016208:Databases, Factual; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000453:epidemiology* / Q000209:etiology; D010343:Patient Admission / Q000706:statistics & numerical data*; D013030:Spain / Q000453:epidemiology