Makis, A.; Grammeniatis, V.; Galati, C.; Kostara, P.; Petridou, E.; Gartzonika, C.; Pappas, A.; Chaliasos, N. Emerging Cases of Pertussis Among Early Infants Born to Unvaccinated Mothers, an Infectious Disease Long Absent in Northwestern Greece. Mediterr J Hematol Infect Dis 2017, 9, e2017043.