1 Division of Biological Sciences, Section of Cellular and Developmental Biology, University of California, San Diego, La Jolla, CA, USA.
2 Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA.
3 Department of Medicine, National University of Singapore, Singapore, Singapore.
4 Tata Institute for Genetics and Society, University of California, San Diego, La Jolla, CA, USA.
5 Division of Biological Sciences, Section of Cellular and Developmental Biology, University of California, San Diego, La Jolla, CA, USA. kcooper@ucsd.edu.
6 Tata Institute for Genetics and Society, University of California, San Diego, La Jolla, CA, USA. kcooper@ucsd.edu.