The UML sequence diagrams in Figure 3 and Figure 4 show two typical interaction scenarios supported by myPHRMachines,
i.e. starting a new VM session and sharing access to a VM between a patient and a medical expert in a care institution. Figure 5 shows a less common interaction scenario involving software vendors. We include this diagram since it clarifies how MyPHRMachines differs from other cloud platforms. All sequence diagrams are based on the conceptual data model of MyPHRMachines shown in Figure 2.