1Woolcock Institute of Medical Research, Camperdown, NSW 2050, Australia [email protected]
2King's College Hospital, London SE5 9RS
3Clontarf, NSW 2093, Australia
Competing interests: CJ has received payment from GlaxoSmithKline Consumer Healthcare Australia, the manufacturer of Panadol (paracetamol), for speaking at a conference. JC serves as a consultant on the Global Analgesics Advisory Board, which is funded by GlaxoSmithKline Consumer Healthcare.