NFV Service Federation: enabling Multi-Provider eHealth Emergency Services - Baranda, Jorge; Mangues Bafalluy, J.; Vettori, L.; Martínez, R.; Antevski, Kiril; Girletti, Luigi; Bernardos Cano, Carlos Jesus; Tomakh, K.; Kucherenko, D.; Landi, G.; Brenes, J.; Li, Xi; et al. (IEEE INFOCOM 2020 - IEEE International Conference on Computer Communications - Virtual Conference, 2020)