1 Department of Oral Pathology, School of Dentistry, Federal University of Ceara, Rua Monsenhor Furtado, Fortaleza, Ceara, 60430‑355, Brazil.
2 Department of Oral Pathology, School of Dentistry, Federal University of Para, Avenida Augusto Correa, 01, Belem, Para, 66075‑110, Brazil.
3 Department of Oral and Maxillofacial Surgery, School of Dentistry, Federal University of Para, Avenida Augusto Correa, Avenida Augusto Correa, 01, Belem, Para, 66075‑110, Brazil.
4 , Belem, Brazil.
5 Department of Oral Pathology, School of Dentistry, Federal University of Para, Avenida Augusto Correa, 01, Belem, Para, 66075‑110, Brazil. radface@hotmail.com.
6 Cell Culture Laboratory, Department of Oral Pathology, School of Dentistry, Federal University of Para, UFPA - Institute of Health Sciences, Avenida Augusto Correa, 01, Belem, Para, 66075‑110, Brazil. radface@hotmail.com.