1. UCSF Weill Institute for Neurosciences, Department of Neurology (LS, ELG, ASK), Department of Emergency Medicine (RYH); Philip R. Lee Institute for Health Policy Studies (RYH, ELG), University of California, San Francisco; Naval Postgraduate School (Y-CS), Monterey, CA; National Bureau of Economic Research (Y-CS), Cambridge, MA; and Department of Neurology (JCC), School of Medicine, Jeju National University, Korea.