OpenEpi:Sample Size for X-Sectional,Cohort,and Clinical Trials
Sample size calculation for randomized control trial (RCT) - YouTube
Pitfalls in reporting sample size calculation in randomized controlled trials published in leading anaesthesia journals: a systematic review - British Journal of Anaesthesia
A practical approach to sample size calculation for fixed populations - ScienceDirect
Power and sample size calculation
2. Sample Size Calculation – Basic Formula - YouTube