共 11 条
[1]
[Anonymous], 1925, STAT METHODS RES WOR
[2]
[Anonymous], J ROYAL STAT SOC D
[3]
A NEW METHOD OF CLASSIFYING PROGNOSTIC CO-MORBIDITY IN LONGITUDINAL-STUDIES - DEVELOPMENT AND VALIDATION
[J].
JOURNAL OF CHRONIC DISEASES,
1987, 40 (05)
:373-383