Sample Size Estimation in Clinical Research From Randomized Controlled Trials to Observational Studies, 2020, doi: 10.1016/j.chest.2020.03.010, Xiaofeng Wang, PhD; and Xinge Ji, MS pdf
Robert Lehr (1992), "SixteenS-squared overD-squared: A relation for crude sample size estimates", Statistics in Medicine (in German), vol. 11, no. 8, pp. 1099–1102, doi:10.1002/sim.4780110811, ISSN0277-6715, PMID1496197
Robert Lehr (1992), "SixteenS-squared overD-squared: A relation for crude sample size estimates", Statistics in Medicine (in German), vol. 11, no. 8, pp. 1099–1102, doi:10.1002/sim.4780110811, ISSN0277-6715, PMID1496197
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Robert Lehr (1992), "SixteenS-squared overD-squared: A relation for crude sample size estimates", Statistics in Medicine (in German), vol. 11, no. 8, pp. 1099–1102, doi:10.1002/sim.4780110811, ISSN0277-6715, PMID1496197