Case C-452/09: Judgment of the Court (First Chamber) of 19 May 2011 (reference for a preliminary ruling from the Corte d’appello di Firenze (Italy)) — Tonina Enza Iaia, Andrea Moggio, Ugo Vassalle v Ministero dell’Istruzione, dell’Università e della Ricerca, Ministero dell’Economia e delle Finanze, Università degli studi di Pisa (Directive 82/76/EEC — Freedom of establishment and freedom to provide services — Doctors — Acquisition of the title of medical specialist — Remuneration during the period of training — Five-year limitation period in respect of the right to payment of periodic remuneration)