Multimodality respiratory physiotherapy reduces mortality but may not prevent ventilator-associated pneumonia or reduce length of stay in the intensive care unit: a systematic review - Pozuelo-Carrascosa, D P; Torres-Costoso, A; Alvarez-Bueno, C; Cavero-Redondo, I; López Muñoz, P; Martínez-Vizcaíno, V (J Physiother, 2018)