Improved tests for a random effects meta-regression with a single covariate. Knapp, G. & Hartung, J. Statistics in medicine, 22(17):2693–2710, 2003.
doi  bibtex   
@article{knapp_improved_2003,
	title = {Improved tests for a random effects meta-regression with a single covariate},
	volume = {22},
	issn = {1097-0258},
	doi = {10.1002/sim.1482},
	number = {17},
	journal = {Statistics in medicine},
	author = {Knapp, G. and Hartung, J.},
	year = {2003},
	keywords = {heterogeneity, meta-analysis, meta-regression, trial-specific covariate},
	pages = {2693--2710},
}

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