1. Department of Bioengineering, University of California (UC), Berkeley, Berkeley, CA 94720, USA.
2. School of Applied Life Sciences, Keck Graduate Institute, Claremont, CA 91711, USA.
3. Berkeley Sensor and Actuator Center, Berkeley, CA 94720, USA.
4. Buck Institute for Research on Aging, Novato, CA 94945, USA.
5. UC Berkeley–UC San Francisco Graduate Program in Bioengineering, Berkeley and San Francisco, CA 94158, USA.
6. Center of Studies and Technical Research of Gipuzkoa and Tecnun (Technological Campus of the University of Navarra), 20018 San Sebastián, Spain.
7. Office of Laboratory Animal Care, UC Berkeley, Berkeley, CA 94720, USA.