Key points are not available for this paper at this time.
From the Department of Radiology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China. The authors declare no conflict of interest. Correspondence: Kai-Hsiung Ko, MD, Department of Radiology, Tri-Service General Hospital, 325, Cheng-Kung Road, Sec. 2, Taipei, 114, Taiwan, Republic of China. E-mail: email protected.
Huang et al. (Wed,) studied this question.