stats, stringr, lme4, quantreg, splines, dplyr, MASS, Matrix,
gss, corpcor, fda, magrittr, methods, nlme, glme, mgcv
stats, lme4, quantreg, splines, dplyr, MASS, Matrix, gss,
corpcor, fda, magrittr, methods, nlme, glme, mgcv, refund,
pracma