TY - Journal of Integrative Medicine A1 - Wei-wei Liu, Liang-ping Hu T1 - Survival analysis using SAS software package Y1 - 2010-05-20 JF - Journal of Integrative Medicine JO - Journal of Integrative Medicine SP - 489 EP - 493 VL - 8 IS - 5 UR - http://www.jcimjournal.com N1 - 10.3736/jcim20100515 ER -