Subjects: *TUMOR risk factors; *STRUCTURAL equation modeling; *PUBLIC relationsCHINA
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Subjects: *ENVIRONMENTAL exposure prevention; *PARTICULATE matter; *STRUCTURAL equation modelingCHINA
Subjects: *PHYSICIAN-patient relations; *METHADONE treatment programs; *UTILIZATION of clinicsCHINA
Subjects: *EMPLOYEE health promotion; *MEDICAL communication; *HEALTH behavior researchCHINA