MacLaren Graeme, Brown Kate L, Thiagarajan Ravi R
Cardiothoracic Intensive Care Unit, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore,
Intensive Care Med. 2014 Sep;40(9):1355-8. doi: 10.1007/s00134-014-3357-x. Epub 2014 Jun 5.