Maternal mortality; Cause of death; Populationsurveillance.
产妇死亡率；死亡原因；人群监测。
2
Public health; Communicable diseases; Populationsurveillance.
公共卫生；传染病；人群监测。
3
Duplicate coding of verbal autopsy results has little advantage over a single-coder system for mortality surveillance or for identifying population patterns of death.