how does the american medical association describe the diease of alcoholism and drug dependence? explain what these terms mean

http://en.wikipedia.org/wiki/Disease_theory_of_alcoholism

https://docs.google.com/viewer?a=v&q=cache:212Q0bJ028kJ:www.ama-assn.org/resources/doc/alcohol/alcoholism_treatable.pdf+ama+disease+drug+dependence&hl=en&gl=us&pid=bl&srcid=ADGEESju8Gv9uWkQVNYwpw3ZbJ2JLMWL-ju7QsUi85kTib5EnAFA-jwAMYR96BDmgqS6f-qiWeB4r8C4pcXwX51r3SrPiDHt6nz4T9uwIFusIbe55022r2zLhDFrUQCc7f5k1pePXDDf&sig=AHIEtbTU7hXFDb5G2VmkNTA1x373Xgbqmg