Saaibi Meléndez, M.; Botero-Rodríguez, F.; Rincón Rodríguez, C. J. Samples in Randomized Clinical Trials With Interim Analysis. Rev Peru Med Exp Salud Publica 2023, 40 (2), 220-8. https://doi.org/10.17843/rpmesp.2023.402.12217.