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Full text available from ABI/INFORM Global: 03/01/1999 to 07/31/2005
Full text available from Healthcare Administration Database: 03/01/1999 to 07/31/2005
Full text available from Psychology Database: 03/01/1999 to 07/31/2005
Ηλεκτρονική πηγή Επιστημονικό περιοδικό