TY  - GEN
AU  - Zhao,M
TI  - [Strengthening the studies on acute exacerbation of chronic obstructive pulmonary disease]
SN  - 0578-1426
PY  - 2002///0118
KW  - Humans
KW  - Pulmonary Disease, Chronic Obstructive
KW  - diagnosis
N1  - Publication Type: Editorial
ER  -