## pssmooth: Flexible and Efficient Evaluation of Principal Surrogates/Treatment Effect Modifiers
`pssmooth` is an R package implementing estimation and testing procedures described in Juraska M., Huang Y., and Gilbert P. B. (2018), *Inference on treatment effect modification by biomarker response in a three-phase sampling design*, Biostatistics, kxy074, https://doi.org/10.1093/biostatistics/kxy074.
