Wean Earlier and Automatically with New technology (the WEAN study): a protocol of a multicentre, pilot randomized controlled trial. - Burns KE; Meade MO; Lessard MR; Keenan SP; Lellouche F; Burns, Karen E A; Meade, Maureen O; Lessard, Martin R; Keenan, Sean P; Lellouche, Francois (Trials, 2009)