Trubey, Rob, Huang, Chao, Lugg-Widger, Fiona V, Hood, Kerenza, Allen, Davina, Edwards, Dawn, Lacy, David, Lloyd, Amy, Mann, Mala, Mason, Brendan, Oliver, Alison, Roland, Damian, Sefton, Gerri, Skone, Richard, Thomas-Jones, Emma, Tume, Lyvonne N, Powell, Colin, "Validity and effectiveness of paediatric early warning systems and track and trigger tools for identifying and reducing clinical deterioration in hospitalised children: a systematic review", BMJ Open, 2019