AUTHOR=Breitling Rainer TITLE=What is systems biology? JOURNAL=Frontiers in Physiology VOLUME=1 YEAR=2010 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2010.00009 DOI=10.3389/fphys.2010.00009 ISSN=1664-042X