Daniel F Hanley1, Yunke Li2,3. 1. Division of Brain Injury Outcomes, School of Medicine, Johns Hopkins University, 750 E. Pratt St., 16th Floor, Baltimore, MD, 21202, USA. dhanley@jhmi.edu. 2. Division of Brain Injury Outcomes, School of Medicine, Johns Hopkins University, 750 E. Pratt St., 16th Floor, Baltimore, MD, 21202, USA. 3. Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China.