Corrigendum: Assessment of Inadequate Use of Pediatric Emergency Medical Transport Services: The Pediatric Emergency and Ambulance Critical Evaluation (PEACE) Study - Poryo, Martin; Burger, Martin; Wagenpfeil, Stefan; Ziegler, Bennet; Sauer, Harald; Flotats-Bastardas, Marina; Grundmann, Ulrich; Zemlin, Michael; Meyer, Sascha (Frontiers in Pediatrics, 2020)