[1] University of Helsinki and Helsinki University Hospital,New Children’s Hospital
[2] Helsinki University Hospital,Department of Otorhinolaryngology
[3] University of Helsinki and Helsinki University Hospital,Head and Neck Surgery, Hearing Clinic
[4] University of Helsinki and Helsinki University Hospital,HUS Diagnostic Center, HUSLAB, Clinical Microbiology
[5] University of Alabama at Birmingham,Department of Neuroradiology, HUS Medical Imaging Center
[6] University of Alabama at Birmingham,Department of Pediatrics, Heersink School of Medicine