External consultations in Germany: Berlin, Datteln, Drensteinfurt, Düren, Hannover, Hessisch Oldendorf, Kiel, Köln, Krefeld, Offenbach, Osnabrück, Potsdam, Stuttgart, Uelzen und Würzburg. External consultations international: Buenos Aires (Argentina) - La Paz (Bolivia) - Caracas (Venezuela) Further information on request by e-mail
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