1. Dentistry and Stomatology Division Ophthalmology, Otolaryngology and Head and Neck Surgery Department Clinical Hospital of Ribeirão Preto School of Medicine University of São Paulo Ribeirão Preto Brazil
2. Department of Oral Diagnosis School of Dentistry of Piracicaba University of Campinas (FOP/UNICAMP) Piracicaba, São Paulo Brazil
3. Hematology and Blood Transfusion Center University of Campinas São Paulo Brazil
4. Department of Oral and Maxillofacial Pathology School of Clinical Dentistry The University of Sheffield Sheffield UK
5. Academic Unit of Respiratory Medicine Department of Infection and Immunity University of Sheffield Sheffield UK