Reference:
  Author: Laurent Gautier and Leslie Cope and Benjamin M. Bolstad and Rafael A. Irizarry
  Title: "affy - analysis of Affymetrix GeneChip data at the probe level"
  Journal: Bioinformatics
  Year: 2004
  Number: 3
  Pages: 307--315
  DOI: 10.1093/bioinformatics/btg405
  issn: 1367-4803
  PMID: 14960456
  URL: http://bioinformatics.oxfordjournals.org/content/20/3/307
  eprint: http://bioinformatics.oxfordjournals.org/content/20/3/307.full.pdf+html
