Design principles for the implementation and functional integration of regional healthcare virtual private networks CTI Technical Report 2001/12/01 - Λάμψας, Π.; Βαγγελάτος, Αριστείδης; Παπανικολάου, Χρήστος; Σοφοτάσιος, Δημήτριος Π.; Μανωλόπουλος, Χρήστος (CTI, 2001)