TY  - RPRT
TI  - Testing for crossover of two hazard functions using Gail and Simon's method.
AU  - Y H Joshua Chen
AU  - G H Frank Liu
PY  - 2006
DO  - 10.1080/10543400600614791
UR  - https://pubmed.ncbi.nlm.nih.gov/16724487/
ID  - 16724487
ER  -