[Some unsolved problems in epidemiological study of risk factors of female lung cancer in China].
Koo
L C
LC
D002681:China / Q000453:epidemiology; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology* / Q000209:etiology; D012307:Risk Factors