aSt Vincent's Clinic/University of New South Wales, Sydney, Australia
bGraduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
Received 29 July, 2007
Accepted 6 August, 2007
Correspondence to Michael F. O'Rourke, Suite 810, St Vincent's Clinic, 438 Victoria Street, Darlinghurst, NSW 2010, Australia Tel: +61 2 8382 6874; fax: +61 2 8382 6875; e-mail: M.ORourke@unsw.edu.au
Conflict of interest: Michael O'Rourke is a founding director of AtCor Medical Pty Ltd, manufacturer of systems for analysing the arterial pulse.