1. Department of Genetics and Human Genetics Institute of New JerseyRutgers University Piscataway NJ 08854 USA
2. Department of BiologyUniversity of Utah Salt Lake City UT 84112 USA
3. Center for C. elegans AnatomyAlbert Einstein College of Medicine Bronx NY 10461 USA
4. Simons Electron Microscopy CenterNew York Structural Biology Center NY 10027 USA