Abbreviations, acronyms & symbols
ABC	= Aristotle Basic Complexity		LR	= Likelihood ratio
ACC	= Aristotle Comprehensive Complexity		PC4	= Pediatric Cardiac Critical Care Consortium
AUC	= Area under the curve		RACHS	= Risk Adjustment for Congenital Heart Surgery
CHD	= Congenital heart disease		REDCap	= Research Electronic Data Capture
CHSS	= Congenital Heart Surgeons Society		ROC	= Receiver-operator characteristics
CNPq	= National Council for Scientific and Technological Development		SIR	= Standardized infection ratio
DATASUS	= National Health System database		SMR	= Standardized mortality ratios
FAPESP	= São Paulo State Foundation for Research Support		STS	= Society of Thoracic Surgeons
IaaS	= Infrastructure as a service		USP	= University of São Paulo
IQIC	= International Quality Improvement Collaborative		VIS	= Vasoactive-inotropic scores