1. Department of Art, University of Toledo, Toledo, OH 43620
2. Department of Biological Sciences, University of Toledo, Toledo, OH 43620
3. Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, Woods Hole, MA 02543
4. Department of Biology, Brandeis University, Waltham, MA 02453
5. Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720