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- [3] Unequal center sizes, sample size, and power in multicenter clinical trials [J]. DRUG INFORMATION JOURNAL, 2004, 38 (04): : 387 - 394
- [4] Erratum to: Unequal Center Sizes, Sample Size, and Power in Multicenter Clinical Trials [J]. Drug information journal : DIJ / Drug Information Association, 2005, 39 (1): : 62 - 62
- [7] Unequal center sizes, sample size, and power in multicenter clinical trials (vol 38, pg 387, 2004) [J]. DRUG INFORMATION JOURNAL, 2005, 39 (01): : 62 - 62