1 Division of Stem Cell Medicine, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Ishikawa, Japan. tkato@kanazawa-med.ac.jp.
2 Department of Pediatrics and Department of Cellular & Molecular Medicine, School of Medicine, University of California San Diego, La Jolla, CA, USA.
3 Center for Academic Research and Training in Anthropogeny (CARTA), Kavli Institute for Brain and Mind, Archealization Center, University of California San Diego, La Jolla, CA, USA.