Extubation outcome after spontanous breathing trials with T-tube or pressure support ventilation - Esteban,A.; Alia,I.; Gordo,F.; Fernandez,R.; Solsona,J.F.; Vallverdu,I.; Macias,S.; Allegue,J.M.; Blanco,J.; Carriedo,D.; Leon,M.; De la Cal,M.A.; et al. (Am J Respir Crit Care Med, 1997)