1. Institute of Clinical Medicine, Aarhus University Hospital-Skejby Sygehus, Aarhus, Denmark
2. Section of Paediatric Urology, Department of Urology, Aarhus University Hospital-Skejby Sygehus, Aarhus, Denmark
3. Department of Connective Tissue Biology, Institute of Anatomy, University of Aarhus, Aarhus, Denmark