Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org|Institute for Systems Biology, Seattle, WA, USA. steven.lewis@systemsbiology.org