Mukhopadhyay A, Yip HS, Prabhuswamy D, Chan YH, Phua J, Lim TK, Leong P. Crit Care. 2010;14(1):R7. Epub 2010 Jan 27.
Departamento de Medicina, National University Hospital, National University Health System, 5 Lower Kent Ridge Road, Singapura 119074, Singapura.