1. Tri-Service General Hospital; Department of Pharmacy Practice; No 325, Sec 2, Chen-Kung Rd Neihu 114 Taipei Taiwan
2. Bispeberg Bakke 26C, 2.th Copenhagen NV Denmark 2400
3. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 3344, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
4. Heartlands Hospital; Public Health Laboratory; Birmingham UK GB-B9 5ST