1 Department of Anesthesiology and Intensive Care Medicine, National Cancer Center Hospital, Tokyo, Japan.
2 Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, 555 University Ave, #2211, Toronto, ON, M5G 1X8, Canada.
3 Program in Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Canada.
4 Department of Anesthesiology, St. Mary's Hospital, Fukuoka, Japan.
5 Department of Anesthesiology and Critical Care Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
6 Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, 555 University Ave, #2211, Toronto, ON, M5G 1X8, Canada. kazu.aoyama@utoronto.ca.
7 Program in Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Canada. kazu.aoyama@utoronto.ca.