1 Lidia Hernandez is Cardiothoracic ICU Nurse Practitioner, Washington University in St Louis, Department of Anesthesiology, 660 South Euclid Avenue, Campus Box 8054, St Louis, MO 63110 (Hlidia@wustl.edu).
2 Jesus Casida is Associate Professor, John Hopkins School of Nursing, 525 N Wolfe St, Baltimore, Maryland.