BryanLGH Medical Center East, Lincoln, Nebraska, United States
General Hospital of Chalkida, Chalkida, Greece
Krankenhaus der Elisabethinen Linz GmbH, Linz, Oberösterreich, Austria
Universitätsklinikum Schleswig-Holstein / AÖR, Lübeck, Germany
CRS Clinical-Research-Services Kiel GmbH, Kiel, Schleswig-Holstein, Germany
Scientific Center of family health & human reprod. problems, Irkutsk, Russian Federation
Altai State Medical University, Barnaul, Russian Federation
Medical Center "Avicenna", Novosibirsk, Russian Federation
CRS Clinical Research Services Berlin GmbH, Berlin, Germany
CRS Clinical Research Services Berlin GmbH, Berlin, Germany
Hill Top Research, Saint Petersburg, Florida, United States