[1] Ludwig Maximilians Univ Munchen, Univ Hosp, Dept Nucl Med, D-81377 Munich, Germany
[2] Ludwig Maximilians Univ Munchen, Dr von Hauner Childrens Hosp, Univ Hosp, Dept Pediat, D-80337 Munich, Germany
[3] Jena Univ Hosp, Dept Otorhinolaryngol, D-07747 Jena, Germany
[4] Ludwig Maximilians Univ Munchen, Univ Hosp, Dept Radiol, D-81377 Munich, Germany