@article{xia10boo,
  title = {Bootstrap-Based Methods for Estimating Standard Errors in {{Cox}}'s Regression Analyses of Clustered Event Times},
  volume = {29},
  journal = {Stat Med},
  author = {Xiao, Yongling and Abrahamowicz, Michal},
  year = {2010},
  keywords = {survival-analysis,cluster-bootstrap,clustered-data,frailty,robust-variance-estimation,correlated-data,repeated-measurements,two-stage-bootstrap},
  pages = {915-923},
  citeulike-article-id = {13265811},
  posted-at = {2014-07-14 14:10:05},
  priority = {0},
  annote = {two-step bootstrap overestimated variance for individual-level covariates}
}

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