[1] Univ Maryland, Med Ctr, Surg Intens Care Unit, Baltimore, MD 21201 USA
[2] Univ Maryland, Med Ctr, Nursing Surg & Cardiac Surg Serv, Baltimore, MD 21201 USA
[3] Univ Maryland, Med Ctr, Dept Anesthesiol, Safety & Qual, Baltimore, MD 21201 USA
[4] Maryland Crit Care Network, Baltimore, MD USA
[5] 943rd Aerosp Med Squadron, Davis, AZ USA
[6] Univ Maryland, Med Ctr, Surg Intermediate Care Unit, Surg Intens Care Unit, Baltimore, MD 21201 USA
[7] Univ Maryland, Med Ctr, Ctr Crit Care & Trauma Educ, Baltimore, MD 21201 USA