I. Introduction
Although much research effort has been put into the design and development of novel e-Health services and applications, their interoperability and integration remains a challenging issue [1]. Firstly, health services deal with large amounts of private data which needs to be both fully protected and readily available to clinicians who need to use it [2]. Health care providers often lack the capability to commit the financial resources for either the research or the infrastructure required [3]. In addition, the public is often skeptical about whether IT systems can be trusted with private clinical information. Past failures have fuelled a culture to restrict any innovation by both members of the public and the politicians responsible for health services [4].