1. Département de Sciences Biologiques, Université de Montréal, Montréal, QC H1X2B2, Canada
2. Eugene Bell Center for Regenerative Biology and Tissue Engineering, Marine Biological Laboratory, Woods Hole, Massachusetts 02542
3. Fischell Department of Engineering, University of Maryland, College Park, Maryland 20742
4. Department of Plant Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X3V9, Canada
5. Canadian Light Source, Saskatoon, SK S7N2V3, Canada