S3method(wpl, default)
S3method(wpl, formula)
S3method(print, wpl)
S3method(summary, wpl)

export(wpl,KMprob,GLMprob,GAMprob,Chenprob,ModelbasedVar,PoststratVar)

import(mgcv, survival)
importFrom("stats", "residuals", "resid", "var", "binomial", "glm", 
           "pchisq", "naprint", "qnorm", "printCoefmat", "model.frame", 
           "model.extract", "model.matrix", "model.response")

