[1] Johns Hopkins Med, Patient Safety & Qual, Baltimore, MD 20814 USA
[2] Johns Hopkins Med, Armstrong Inst Patient Safety & Qual, Baltimore, MD USA
[3] Johns Hopkins Univ, Anesthesiol & Crit Care Med Surg & Hlth Policy &, Baltimore, MD USA
[4] Armstrong Inst Patient Safety & Qual, Baltimore, MD USA
[5] Johns Hopkins Hlth Syst, Baltimore, MD USA
[6] Armstrong Inst Patient Safety & Qual, Sigma Deployment, Baltimore, MD USA
[7] Johns Hopkins Childrens Ctr, Qual & Patient Safety, Baltimore, MD USA
[8] Johns Hopkins Univ, Sch Med, Pediat & Hlth Policy & Management, Baltimore, MD USA
[9] Childrens Hosp Assoc, Qual Transformat, Alexandria, VA USA
[10] Johns Hopkins Univ, Anesthesiol & Crit Care Med, Baltimore, MD USA