| AAN | AIDS-associated nephropathy; alpha-amino nitrogen; American Academy of Neurology; American Academy o... |
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| AACCN | American Association of Critical Care Nurses |
| AAIN | American Association of Industrial Nurses |
| AANPI | American Association of Nurses Practicing Independently |
| AAOHN | American Association of Occupational Health Nurses |
| loosening of association | A manifestation of a severe thought disorder characterised by the lack of an obvious connection between one thought or phrase and the next, or with the response to a question. (05 Mar 2000) |
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