Neurally adjusted ventilaroty assist (NAVA) or pressure support ventilation (PSV) during spontaneous breathing trials in critically ill patients: a crossover trial - Ferreira, Juliana C; Silva, Fabia Diniz; Moriya, Henrique Takachi; Alencar, Adriano Mesquita; Amato, Marcelo Britto Passos; Carvalho, Carlos Roberto Ribeiro De (BMC pulmonary medicine, 2017)