Tutte le immagini sono state ottenute dagli archivi del Dr. A. Michaelakis (BPI), del Prof. C. Athanassiou (Università della Tessalia), di B. Sotiroudas (SEAME) e dal sito web del CDC (Centro per la Prevenzione e il Controllo delle Malattie) [http://phil.cdc.gov/phil/home.asp (free of copyrights)]

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