Protocol for diaphragm pacing in patients with respiratory muscle weakness due to motor neurone disease (DiPALS): a randomised controlled trial oleh McDermott Christopher J, Maguire Chin, Cooper Cindy L, Ackroyd Roger, Baird Wendy O, Baudouin Simon, Bentley Andrew, Bianchi Stephen, Bourke Stephen, Bradburn Mike J, Dixon Simon, Ealing John, Galloway Simon, Karat Dayalan, Maynard Nick, Morrison Karen, Mustfa Naveed, Stradling John, Talbot Kevin, Williams Tim, Shaw Pamela J