1. Department of Nurse Anesthesia, School of Allied Health Professions; Virginia Commonwealth University; PO Box 980226, 1200 East Broad Street Richmond VA 23298-0226
2. Dominion Anesthesia; PLLC; 1701 N George Mason Dr Arlington VA 22205
3. Virginia Commonwealth University; VCU Medical Center, Department of Biostatistics; PO Box 980932, Richmond, VA 23298-0032