[1] Lucile Packard Childrens Hosp, Perioperat Qual Improvement, Palo Alto, CA 94304 USA
[2] Stanford Univ, Med Ctr, Stanford, CA 94305 USA
[3] Lucile Packard Childrens Hosp, Palo Alto, CA USA
[4] Lucile Packard Childrens Hosp, Anesthesiol, Palo Alto, CA USA
[5] Lucile Packard Childrens Hosp, Div Pediat Anesthesia, Palo Alto, CA USA
[6] Lucile Packard Childrens Hosp, Pediat, Palo Alto, CA USA