/*
The data set is taken from Table 1 in Lee, Wei and Ying (JASA 1993).
Each line contains data for three rats in the same litter:
1st variable: treatment group (=1 if drug treated; =0 otherwise) 
              for the first rat;
2nd variable: treatment group (=1 if drug treated; =0 otherwise) 
              for the second rat;
3rd variable: treatment group (=1 if drug treated; =0 otherwise) 
              for the third rat;
4th variable: tumor appearance or censoring time for the first rat;
5th variable: censoring indicator (=0 for censoring; =1 for tumor appearance)
              for the first rat;
6th variable: tumor appearance or censoring time for the second rat;
7th variable: censoring indicator (=0 for censoring; =1 for tumor appearance)
              for the second rat;
8th variable: tumor appearance or censoring time for the third rat;
9th variable: censoring indicator (=0 for censoring; =1 for tumor appearance)
              for the third rat;
*/
0 1 1 4.61512051684126 0 3.89182029811063 1 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.62497281328427 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.34380542185368 0 4.57471097850338 0 4.36944785246702 0 
0 1 1 4.48863636973214 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.47733681447821 1 4.56434819146784 1 4.64439089914137 0 
0 1 1 4.64439089914137 1 4.54329478227 0 4.34380542185368 1 
0 1 1 4.56434819146784 1 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.40671924726425 0 4.34380542185368 0 4.64439089914137 0 
0 1 1 4.24849524204936 1 4.64439089914137 0 4.34380542185368 0 
0 1 1 4.48863636973214 1 4.51085950651685 0 4.49980967033027 0 
0 1 1 4.51085950651685 0 4.24849524204936 0 4.52178857704904 0 
0 1 1 3.66356164612965 0 3.80666248977032 0 3.91202300542815 1 
0 1 1 4.63472898822964 0 4.23410650459726 0 4.51085950651685 0 
0 1 1 4.53259949315326 0 4.64439089914137 0 4.63472898822964 0 
0 1 1 4.44265125649032 0 4.27666611901606 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.14313472639153 0 4.6443908994137 0 
0 1 1 4.64439089914137 0 4.64439089914137 0 4.30406509320417 0 
0 1 1 4.39444915467244 0 4.64439089914137 0 4.23410650459726 0 
0 1 1 4.20469261939097 1 4.64439089914137 0 4.21950770517611 1 
0 1 1 4.64439089914137 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.4188406077966 0 3.68887945411394 1 
0 1 1 4.46590811865458 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.48863636973214 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.35670882668959 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.39444915467244 1 4.15888308335967 1 
0 1 1 4.45434729625351 1 4.00733318523247 1 4.54329478227 0 
0 1 1 3.52636052461616 1 4.64439089914137 0 3.98898404656427 1 
0 1 1 4.33073334028633 0 4.46590811865458 0 4.30406509320417 0 
0 1 1 4.63472898822964 1 4.29045944114839 1 4.43081679884331 1 
0 1 1 4.62497281328427 1 4.64439089914137 0 4.38202663467388 0 
0 1 1 4.38202663467388 1 4.64439089914137 0 4.29045944114839 0 
0 1 1 3.80666248977032 1 4.36944785246702 0 4.64439089914137 0 
0 1 1 4.54329478227 1 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.64439089914137 0 4.61512051684126 1 4.54329478227 0 
0 1 1 4.33073334028633 0 4.43081679884331 1 4.35670882668959 1 
0 1 1 4.38202663467388 1 4.39444915467244 1 4.33073334028633 0 
0 1 1 4.27666611901606 1 4.55387689160054 0 4.64439089914137 0 
0 1 1 4.29045944114839 1 4.64439089914137 0 4.18965474202643 1 
0 1 1 4.52178857704904 1 4.64439089914137 0 4.62497281328427 1 
0 1 1 4.64439089914137 0 4.58496747867057 0 4.29045944114839 0 
0 1 1 4.00733318523247 0 4.64439089914137 0 4.64439089914137 0 
0 1 1 3.89182029811063 0 4.4188406077966 0 4.34380542185368 0 
0 1 1 4.48863636973214 1 4.64439089914137 0 4.64439089914137 0 
0 1 1 4.47733681447821 0 4.36944785246702 0 4.59511985013459 0 
0 1 1 4.63472898822964 1 4.51085950651685 0 4.64439089914137 0 
0  1 4.64439089914137 0 4.64439089914137 0 4.36944785246702 1