William E., USA

William E., USA, November 2018, University Hospital Saarland Homburg, Prof. Dr. med. Samer Ezziddin.

Mykhailo N., Ukraine

Mykhailo N., Ukraine, October 2018, Clinic for Molecular Orthopedics Duesseldorf, Priv.-Doz. Dr. Baltzer.

Farid K., Jordan

Farid K., Jordan, September, 2016, Charite University Hospital Berlin, Prof. Dr. med. Bertram Wiedenmann.

Irina K., Belarus

Irina K., Belarus, August, 2017, University Hospital Bonn, Prof. Dr. Finger.

Omar A., Jordan

Omar A., Jordan, March, 2017, Academic Hospital Augustinerinnen.

Hrygorii V., Ukraine

Hrygorii V., Ukraine, September 2018, St. Vincentius Hospital Karlsruhe-Academic Hospital of the University of Freiburg, Prof. Dr. Christian Meyer.

Tariq K., United Kingdom

Tariq K., United Kingdom, August 2018, University Hospital Saarland Homburg, Dr. med. Michel Al Ghazal.

Nemattilo T., Kyrgyzstan

Nemattilo T., Kyrgyzstan, July, 2017, Charite University Hospital Berlin, Prof. Dr. Walter Zidek.

Douglas D., United States

Douglas D., United States, October 2018, University Hospital Saarland Homburg, Dr.med. Michel Al Ghazal.

Artavazd and Susambar, Armenia

Artavazd and Susambar, Armenia, November 2017, University Hospital Düsseldorf.

Younis Talib Jalal S., Iraq

Younis Talib Jalal S., Iraq, August, 2017, Urological Private Practice, Prof. Dr. med. H. Schuldes.

Jaroslav V., Sweden

Jaroslav V., Sweden, September 2018, University Hospital Saarland Homburg, Dr. Winkler.

Ali Abdurahman A., Saudi Arabia

Ali Abdurahman A., Saudi Arabia, April, 2017, Asklepios Childrens Hospital in Sankt Augustin, Prof. Dr. med. Boulos Asfour.

William E., USA

William E., USA, November 2018, University Hospital Saarland Homburg, Dr. Winkler.

Oksana K., Belarus

Oksana K., Belarus, March, 2017, Park-Clinic Weissensee, PD, Dr. med. Oliver Hauschild.