Case C-388/09: Judgment of the Court (Second Chamber) of 30 June 2011 (reference for a preliminary ruling from the Bundessozialgericht (Germany)) — Joao Filipe da Silva Martins v Bank Betriebskrankenkasse — Pflegekasse (Reference for a preliminary ruling — Social security — Regulation (EEC) No 1408/71 — Articles 15, 27 and 28 — Articles 39 EC and 42 EC — Former migrant worker — Work in the Member State of origin and in another Member State — Retirement in the Member State of origin — Pensions paid by both Member States — Separate social security scheme covering the risk of reliance on care — Existence in the other former Member State of employment — Optional continued affiliation to that scheme — Maintenance of the right to a care allowance after the return to the Member State of origin)