1. Department of Gynaecology, Ziekenhuis Oost-Limburg Genk, Schiepse bos 6, Genk, Belgium
2. Department of Rheumatology, AZ Alma campus Eeklo, Ringlaan 15, Eeklo, Belgium
3. Hasselt University, Faculty of Medicine and Life Sciences, Agoralaan, Diepenbeek, Belgium
4. Hasselt University, Department of Physiology, Diepenbeek, Belgium