1. Graduate Program, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, People’s Republic of China.
2. National Institute of Biological Sciences, 7 Science Park Road, Zhong Guan Cun Life Science Park, Beijing 102206, People’s Republic of China.
3. Life Science College, Beijing Normal University, Beijing 100875, People’s Republic of China.
4. Department of Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100094, People’s Republic of China.