1. Center of Stem Cell and Regenerative Medicine School of Medicine Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China
2. Eye Institute of Zhejiang University Eye Center of Second Affiliated Hospital of Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China
3. Josep Carreras Leukemia Research Institute and Cell Therapy Program of School of Medicine University of Barcelona, Barcelona, Spain
4. Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
5. Zhejiang Provincial Key Laboratory of Tissue Engineering and Regenerative Medicine, Hangzhou, People's Republic of China