1
Έκδοση 1998
Full text available from Biological Science Database: 03/01/1997 to 1 year ago
Full text available from Health & Medical Collection: 03/01/1997 to 1 year ago
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
2
Έκδοση 2006
Full text available from Health & Medical Collection: 01/01/2009 to present
Full text available from Healthcare Administration Database: 01/01/2009 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό