1. TNO Systems Biology, Netherlands Organization for Applied Scientific Research, P.O. 360, 2700 AJ Zeist, Netherlands.
2. BG Medicine, Inc., 610 Lincoln Street North, Waltham, MA 02451, USA.
3. Leiden/Amsterdam Center for Drug Research (LACDR) and Center for Medical Systems Biology, Leiden University, Gorlaeus Laboratories, PO Box 9502, 2300 RA Leiden, The Netherlands.