[1] Univ North Carolina Chapel Hill, Sch Med, Dept Radiol, Div Neuroradiol, Chapel Hill, NC USA
[2] Univ North Carolina Chapel Hill, Biomed Res Imaging Ctr, Sch Med, Chapel Hill, NC USA
[3] Stanford Sch Med, Dept Radiol, Div Pediat Neuroradiol, Stanford, CA USA
[4] Taipei Vet Gen Hosp, Div Urol, Dept Surg, Taipei, Taiwan
[5] Natl Yang Ming Chiao Tung Univ, Hsinchu, Taiwan
[6] Taichung Vet Gen Hosp, Dept Radiol, Div Neuroradiol, Taichung, Taiwan
[7] Univ North Carolina Chapel Hill, Sch Med, Dept Radiol, Div Pediat Radiol, Chapel Hill, NC USA