1. Division of Histology and Embryology; Key Laboratory for Regenerative Medicine of the Ministry of Education, Medical College, Jinan University; Guangzhou, China
2. Division of Cell and Developmental Biology; University of Dundee; Dundee, UK
3. Key Laboratory for Regenerative Medicine of the Ministry of Education, School of Biomedical Sciences, Chinese University of Hong Kong; Shatin, Hong Kong
4. Key Laboratory of Medical Cell Biology, China Medical University; Shenyang, China