1. i-Vis Research Lab, Computer Engineering Department, Bilkent University, Ankara 06800, Turkey
2. Molecular & Medical Genetics Department, School of Medicine, Oregon Health & Science University, Portland, OR 97239, USA
3. Visualization Design Lab, School of Computing, University of Utah, Salt Lake City, UT 84112, USA
4. European Institute for Systems Biology and Medicine, CIRI UMR5308, CNRS-ENS-UCBL-INSERM, Université de Lyon, 69007 Lyon, France
5. Luxembourg Centre for Systems Biomedicine, University of Luxembourg, L-4367 Belvaux, Luxembourg
6. Computer Science Department, University of Massachusetts Boston, Boston, MA 02125, USA