共 59 条
[2]
[Anonymous], Healthcare cost utilization project
[3]
APELGREN KN, 1995, AM SURGEON, V61, P240
[4]
ATTWOOD SEA, 1992, SURGERY, V112, P497
[6]
A NEW METHOD OF CLASSIFYING PROGNOSTIC CO-MORBIDITY IN LONGITUDINAL-STUDIES - DEVELOPMENT AND VALIDATION
[J].
JOURNAL OF CHRONIC DISEASES,
1987, 40 (05)
:373-383