DOI: 10.1055/s-00000012

Endoscopy

References

Fleiss JL, Tytun A, Ury SHK.
A simple approximation for calculating sample sizes for comparing independent proportions.

Biometrics 1980;
36: 343-346

Fleiss JL, Tytun A, Ury SHK.
A simple approximation for calculating sample sizes for comparing independent proportions.

Biometrics 1980;
36: 343-346

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