1. Chinese PLA General Hospital, Beijing, China.
2. The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
3. Nanjing Drum Tower Hospital, Nanjing, China.
4. Shanghai General Hospital, Shanghai, China.
5. Medtronic, Beijing, China.
6. Medtronic, Shanghai, China.
7. Medtronic, Northridge, California, USA.