1. Department of Radiology, West China Hospital, Sichuan University, Chengdu, China.
2. Department of Radiology, The First Affiliated Hospital of Kunming Medical College, Kunming, China.
3. APT Therapeutics Inc., St Louis, MO, USA.
4. Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA.