1. Department of Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
2. Department of Physiotherapy, Regional University Center of Espírito Santo do Pinhal, Espírito Santo do Pinhal, São Paulo, Brazil
3. Department of Respiratory & Sleep Medicine, John Hunter Hospital, New Lambton, NSW, Australia
4. Department of Social Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil