f.pvalue		A function for quickly computing parametric p-values from
			multiple F-tests
sva			Estimate surrogate variables with the two-step or iterative
			algorithm
num.sv			Estimate the number of significant surrogate variables
irwsva.build		Build surrogate variables with an iterative algorithm 
			from gene expression and model data
twostepsva.build 	Build surrogate variables with a two-step algorithm
			from gene expression and model data. 
fsva			Single sample SVA correction for prediction purposes, requires a training database
