import(lme4,optimx,MASS,car)
export(macc,sim.data.single,sim.data.multi)
importFrom("nlme","lme","VarCorr","intervals","gls","lmeControl","varIdent")
importFrom("graphics", "abline", "legend", "lines", "plot", "points","polygon")
importFrom("stats", "coef", "confint", "lm", "logLik", "optimize","qnorm", "rnorm", "update")
