title: Authors' reply.
authors.affiliation: Kensington Park Medical Practice, South Australia, Australia.|Faculty of Medicine, University of Adelaide, South Australia, Australia.
authors.forename: Brian
authors.initials: B
authors.lastname: Symon
authors.affiliation: Kensington Park Medical Practice, South Australia, Australia.|Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia, Australia.
authors.forename: Georgina E
authors.initials: GE
authors.lastname: Crichton