TY - JOUR T1 - Survival analysis part IV: further concepts and methods in survival analysis. JO - Br J Cancer PY - 2003/08/26 AU - Clark TG AU - Bradburn MJ AU - Love SB AU - Altman DG ED - DO - DOI: 10.1038/sj.bjc.6601117 VL - 89 IS - 5 SP - 781 EP - 786 Y2 - 2025/11/24 ER -