Judgment of the Court of 9 September 2003 in Case C-285/01 (Reference for a preliminary ruling from the Cour administrative d'appel de Douai): Isabel Burbaud v Ministère de l'Emploi et de la Solidarité (Recognition of diplomas — Hospital managers in the public service — Directive 89/48/EEC — Definition of "diploma" — Entrance examination — Article 48 of the EC Treaty (now, after amendment, Article 39 EC))