[1] Univ Iowa, Coll Med, Div Pulm & Crit Care & COVID 19 Crit Care Inciden, Sioux City, IA 52242 USA
[2] Univ Iowa, Coll Med, Pediat Infect Dis & COVID 19 Incident Command, Unity Point Hlth,St Lukes Reg Med Ctr, Sioux City, IA 52242 USA
[3] Univ Iowa, Coll Med, Dept Pediat, Sioux City, IA 52242 USA
[4] Indira Gandhi Med Coll, Dept Pediat, Shimla 171001, Himachal Prades, India