[1] Yale Sch Med, Dept Anesthesiol, 333 Cedar St,Brady Bldg, New Haven, CT 06519 USA
[2] Jinan Univ, Affiliated Hosp 1, Med Imaging Ctr, Guangzhou, Guangdong, Peoples R China
[3] Univ Edinburgh, Dementia Res Inst, Ctr Clin Brain Sci, Brain Res Imaging Ctr, Edinburgh, Midlothian, Scotland