1. Department of Otolaryngology & Communication Sciences Medical College of Wisconsin Milwaukee Wisconsin USA
2. Department of Neurosurgery Medical College of Wisconsin Milwaukee Wisconsin USA
3. Department of Pediatric and Adolescent Medicine Mayo Clinic Rochester MN
4. Department of Communication Sciences & Disorders University of Wisconsin ‐ Eau Claire Eau Claire Wisconsin USA
5. Department of Otolaryngology – Head & Neck Surgery The Ohio State Wexner Medical Center Columbus Ohio USA
6. Speech Research Laboratory, Department of Psychology Indiana University Bloomington Indiana USA
7. Department of Psychiatry Indiana University School of Medicine Indianapolis Indiana USA