1 Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora, Colorado, USA. Electronic address: christopher.a.mancuso@cuanschutz.edu.
2 Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA.
3 Children's Hospital Colorado Research Institute, Aurora, Colorado, USA.
4 Department of Surgery, University of Colorado School of Medicine, Aurora, Colorado, USA.
5 Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora, Colorado, USA.
6 Department of Anesthesiology, University of Colorado School of Medicine, Aurora, Colorado, USA.