Passive smoking exposure: a risk factor for chronic bronchitis and asthma in adults?
The control of passive smoke exposure in the workplace might reduce the risk of respiratory symptoms independently of exposure to other airborne contaminants.
Although this study provides no evidence that race is an independent prognostic factor for overall survival in patients with WHO 2/3 NPC, it does suggest that relapse patterns may vary, with a higher rate of late primary failures (offset by a lower rate of distant failure) in the Asian population. Further confirmatory studies with larger patient cohorts are indicated.