1. Center for Research in Biological Systems and the National Center for Microscopy and Imaging Research; University of California, San Diego; La Jolla California U.S.A.
2. Department of Neurosciences; University of California at San Diego, La Jolla; San Diego California U.S.A.
3. Salk Institute for Biological Studies; La Jolla California U.S.A.
4. Janelia Research Campus; Howard Hughes Medical Institute; Ashburn Virginia U.S.A.