1. Primary and Stem Cell Systems, Life Technologies, Madison, Wisconsin, USA
2. Laboratory for Stem Cell Research, Aalborg University, Aalborg, Denmark
3. Animal Reproduction Institute, Guangxi University, Nanning, China
4. NUS Tissue Engineering Program, Life Sciences Institute, National University of Singapore, Singapore
5. Primary and Stem Cell Systems, Life Technologies, Carlsbad, California, USA
6. Molecular Probes, Life Technologies, Eugene, Oregon, USA
7. Primary and Stem Cell Systems, Life Technologies, Frederick, Maryland, USA