\name{retrievePSRseq}
\alias{retrievePSRseq}
\title{This function, given a file containing exon-level probesets retrieves Probe selection Regions, 
PRS, from RRE db}
\description{
This function retrieve from RRE the PSR sequences associated to the exon-level probe sets
}
\usage{
retrievePSRseq()
}
\author{Raffaele A Calogero}
\keyword{ manip }