1. Australian Centre for Pharmacometrics, School of Pharmacy and Medical Sciences; University of South Australia; Frome Road, GPO Box 2471 Adelaide South Australia 5000
2. School of Pharmacy and Medical Sciences; University of South Australia, Sansom Institute for Health Research; Frome Road, GPO Box 2471 Adelaide South Australia 5000
3. Department of Rheumatology; Royal Adelaide Hospital; North Terrace Adelaide South Australia 5000
4. Discipline of Medicine; Adelaide University; North Terrace Adelaide South Australia 5000 Australia