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Author’s reply
Reply to: Analysis of covariance and sample size calculation for comparing means in randomized controlled trials
Naimeh Mesri Alamdari
1 
, Samad Ghaffari
2 
, Neda Roshanravan
2*
1 Endocrine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
2 Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran