1. Nova Medical School, Lisbon, Portugal
2. Hospital Cuf Descobertas, Lisbon, Portugal
3. Hospital D. Estefania, Lisbon, Portugal
4. Hospital Santa Maria, Lisbon, Portugal
5. EpiDoC Unit–CEDOC, NOVA Medical School, Lisbon, Portugal
6. University of Sao Paulo, Sao Paulo, Brazil
7. Department of Otolaryngology, SUNY Downstate Medical Center, Brooklyn, New York, USA