Physical rehabilitation in critically ill children: a multicenter point prevalence study in the United States - Kudchadkar, S R; Nelliot, A; Awojoodu, R; Prevalence of Acute Rehabilitation for Kids in the PICU (PARK-PICU) Investigators and the Pediatric Acute Lung Injury and Sepsis Investigators (PALISI) Network (Crit Care Med, 2020)