A gene set analysis function for one-sided test (OLS) and two-sided test (multivariate analysis of variance). Three multiple comparison procedures, Dunnett, Tukey, and sequential pairwise compar- ison, are implemented. MAVTgsa computes the p-values and FDR (false discovery rate) q-values for all gene sets. The p-values for individual genes in a significant gene set are also listed. MAVT- gsa generates a GST-plot of the empirical distribution function of the ranked test statistics of a given gene set.