Northern Anesthesia & Pain Medicine, 10928 Eagle River Rd. #240, Eagle River, AK 99577, USA; Department of Anesthesiology & Pain Medicine, University of Washington School of Medicine, 1959 NE Pacific St., Seattle, WA 98195, USA; Corresponding author at: Northern Anesthesia & Pain Medicine, 10928 Eagle River Rd. #240, Eagle River, AK 99577, USA.
