title: Authors' reply.
authors.affiliation: Centre for Biomedical Ethics, Singapore.
authors.forename: Tamra
authors.initials: T
authors.lastname: Lysaght
authors.affiliation: Centre for Biomedical Ethics, Singapore.
authors.forename: Zohar
authors.initials: Z
authors.lastname: Lederman
authors.affiliation: Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
authors.forename: Paul Anantharajah
authors.initials: PA
authors.lastname: Tambyah