作者单位:Univ Malaya, Dept Biomed Engn, Kuala Lumpur 50603, Malaysia[1]Univ New S Wales, Grad Sch Biomed Engn, Sydney, NSW, Australia[2]Alfred Hosp, Intens Care Unit, Melbourne, Vic, Australia[3]Univ Malaya, Dept Elect Engn, Kuala Lumpur 50603, Malaysia[4]Univ Queensland, Sch Med, Brisbane, Qld, Australia[5]