1. Department of Medicine, Federal University of Mato Grosso, Sinop, Mato Grosso, Brazil;
2. Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina, Brazil;
3. School of Medicine, Federal University of Ceará, Sobral, Ceará, Brazil;
4. Department of Internal Medicine, Mandaqui Medical Complex, São Paulo, São Paulo, Brazil;
5. Department of Medicine, Sciences Medical School of Santos, Santos, São Paulo, Brazil;
6. Department of Neurosurgery, São Lucas Hospital, Juína, Mato Grosso, Brazil;
7. Department of Occupational Medicine, Kaiser Permanente, Los Angeles, California, USA