[Research for national coal mine and local coal mine pneumoconiosis morbidity in certain area].
Ding
Xin-ping
XP
Wang
Yan
Y
Wu
Quan-lan
QL
D002681:China / Q000453:epidemiology; D003032:Coal Mining; D006801:Humans; D011009:Pneumoconiosis / Q000453:epidemiology*; D017149:Private Sector / Q000706:statistics & numerical data; D017150:Public Sector / Q000706:statistics & numerical data; D012189:Retrospective Studies