1 Division of Pulmonary and Critical Care and COVID-19 Critical Care Incident Command, Unity Point Health at St. Luke's Regional Medical Center, Sioux City, Iowa, USA.
2 Pediatric Infectious Disease and COVID-19 Incident Command, Unity Point Health at St. Luke's Regional Medical Center; Department of Pediatrics, University of Iowa Carver College of Medicine, Sioux City, Iowa, USA.
3 Department of Pediatrics, Indira Gandhi Medical College, Shimla 171 001, Himachal Pradesh, India.