[1] NEXTCLIN IVF Zentren Prof Zech Bregenz, Roemerstr 2, A-6900 Bregenz, Austria
[2] Ctr Hosp Inter Reg Edith Cavell CHIREC, Brussels, Belgium
[3] IVF Zentren Prof Zech Salzburg, Innsbrucker Bundesstr 35, A-5020 Salzburg, Austria
[4] NEXTCLINICS, Innsbrucker Bundesstr 35, A-5020 Salzburg, Austria