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\bibitem{Wu2008} Wu, S., Chang, M., Lin, H.-N., \& Heh, J.-S. (2008). Design Petri Net to Simulate the Processes of Tele-Healthcare. In \textit{In the Proceedings of the 7th WSEAS International Conference on E-ACTIVITIES (E-Learning, E-Communities, E-Commerce, E-Management, E-Marketing, E-Governance, Tele-Working)} (pp. 183--188). Cairo, Egypt: In the Proceedings of the 7th WSEAS International Conference on E-ACTIVITIES.

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