NCBI GEO: mining tens of millions of expression profiles - database and tools update.
Tanya BarrettDennis B. TroupStephen E. WilhitePierre LedouxDmitry RudnevCarlos EvangelistaIrene F. KimAlexandra SobolevaMaxim TomashevskyRon EdgarPublished in: Nucleic Acids Res. (2007)