Corrigendum to “Optimization of remotely delivered intensive lifestyle treatment for obesity using the Multiphase Optimization Strategy: Opt-IN study protocol” [Contemp. Clin. Trials 38 (2014) 251–259]

In Pellegrini et al. [1], we reported the use of a fractional factorial experimental design to examine five intervention components under consideration for inclusion in a weight loss intervention. We recently discovered that due to a clerical error, the experimental design we presented in that article, which is the design we had been implementing, was not identical to the design we originally selected and intended to implement. In this corrigendum, we present the fractional factorial designwe intended to apply in Pellegrini et al., and explain howwe decided to address the problem of inadvertent implementation of a partially incorrect experimental design.