1. Department of Anesthesiology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
2. Department of Anesthesiology, Penn Medicine Lancaster General Hospital, 555 N Duke St., Lancaster, PA 17602, USA
3. Department of Anesthesiology and Critical Care, Perelman School of Medicine, The University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA