DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Lee EW, Wei LJ, Amato DA.
Cox-type regression analysis for large numbers of small groups of correlated failure time observations.
In: Klein JP, Goel PK. eds.
Columbus, OH: Survival Analysis: State of the Art Kluwer Academic Publishers; 1992: 237-247
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