TY - RPRT TI - Permutation tests for comparing marginal survival functions with clustered failure time data. AU - J Cai AU - Y Shen PY - 2000 DO - 10.1002/1097-0258(20001115)19:21<2963::aid-sim593>3.0.co;2-h UR - https://pubmed.ncbi.nlm.nih.gov/11042626/ ID - 11042626 ER -