@article{andersen_testing_1999,
	title = {Testing for centre effects in multi-centre survival studies: a {Monte} {Carlo} comparison of fixed and random effects tests},
	volume = {18},
	number = {12},
	journal = {Statistics in Medicine},
	author = {Andersen, P. K. and Klein, J. P. and Zhang, M. J.},
	year = {1999},
	pages = {1489--1500}
}

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