- The Citizen Health System (CHS): a modular medical contact center providing quality telemedicine services. Maglaveras, N., Chouvarda, I., Koutkias, V.G., Gogou, G., Lekka, I., Goulis, D., Avramidis, A., Karvounis, C., Louridas, G., Balas, E.A. IEEE transactions on information technology in biomedicine : a publication of the IEEE Engineering in Medicine and Biology Society. (2005)