共 31 条
[2]
[Anonymous], AHRQ PUBLICATION
[3]
[Anonymous], 2005, Stata Statistical Software: Release 9
[6]
BUTLER DJ, 1993, HLTH SOC WORK, P49
[8]
DUGAN E, 2005, BMC HEALTH SERV RES, P64
[9]
Epstein K, 2006, J NATL MED ASSOC, V98, P1109