1 Division of Vascular and Interventional Radiology, Department of Radiology, K325, Queen Mary Hospital, University of Hong Kong, 102 Pokfulam Rd., Hong Kong. Electronic address: liyanlinjubi@hotmail.com.
2 Division of Vascular and Interventional Radiology, Department of Radiology, K325, Queen Mary Hospital, University of Hong Kong, 102 Pokfulam Rd., Hong Kong.