[1] Concord Hosp, Concord, Australia
[2] Heritage Med Res Ctr, Calgary, AB, Canada
[3] Univ Sheffield, Sheffield, S Yorkshire, England
[4] Hosp Rangueil, Toulouse, France
[5] Procter & Gamble Pharmaceut, Staines, England
[6] Atlanta Res Ctr, Decatur, GA USA