1. Janssen Pharmaceutica. Dear Health Professional letter. Available from: http://www.fda.gov/medwatch/safety/2000/propul1.htm [24 June 2002].
2. Wyeth Ayerst Laboratories, Inc. Dear Healthcare Professional Letter. Available from: http://www.fda.gov/medwatch/safety/1998/duract3.htm [24 June 2002].
3. Hoffman-LaRoche, Inc. Roche announces voluntary withdrawal of Posicor. Available from: http://www.fda.gov/medwatch/safety/1998/mibefr.htm [24 June 2002].
4. US Food and Drug Administration. Rezulin to be withdrawn from the market. Available from: http://www.fda.gov/bbs/topics/NEWS/NEW00721.html [24 June 2002].