1. Center for iPS Cell Research and Application, Kyoto University, Shogoin, Sakyo-ku, Kyoto, Japan
2. Charité-Universitätsmedizin Berlin, Berlin-Brandenburg Center for Regenerative Therapies, Berlin, Germany
3. National Institute for Biological Standards and Control, an Operating Centre of the Medicines and Healthcare Products Regulatory Agency, South Mimms, United Kingdom
4. Department of Genetics and Human Genetics Institute of New Jersey, Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA