[1] Ctr Gene Regulac CRG, Bioinformat & Genom Programme, Barcelona, Spain
[2] ETH, CH-8092 Zurich, Switzerland
[3] Swiss Inst Bioinformat, CH-8092 Zurich, Switzerland
[4] GlaxoSmithKline Inc, Computat Biol, Stevenage SG1 2NY, Herts, England
[5] Wellcome Trust Genome Campus, European Bioinformat Inst, Cambridge CB10 1SD, England
[6] Stockholm Univ, AlbaNova Univ Ctr, Stockholm Bioinformat Ctr, S-10691 Stockholm, Sweden
[7] Lawrence Berkeley Natl Lab, Berkeley, CA 94618 USA