export(EWAS_plots, EWAS_QC, EWAS_series, P_correlation, P_lambda, translate_header)
importFrom(utils, flush.console, read.table, write.table) 
importFrom(stats, cor, median, pchisq, ppoints, qbeta,
           qchisq, quantile)
importFrom(grDevices, dev.off, palette, png, tiff)
importFrom(graphics, abline, axis, boxplot, hist, lines,
           mtext, par, plot, points, polygon, text)
importFrom(methods, is)
