1 Department of Pediatric Surgery and Orthopedics, University Children's Hospital Regensburg (KUNO) at the Hospital St. Hedwig of the Order of St. John, Steinmetzstraße 1-3, 93049, Regensburg, Deutschland. markus.denzinger@barmherzige-regensburg.de.
2 Department of Medicine, St. John of God Hospital Regensburg, Regensburg, Deutschland.
3 Department of Pediatric Surgery and Orthopedics, University Children's Hospital Regensburg (KUNO) at the Hospital St. Hedwig of the Order of St. John, Steinmetzstraße 1-3, 93049, Regensburg, Deutschland.