1. Nephrology Service; University Hospital, Federal University of Maranhão; São Luís Brazil
2. Central Public Health Laboratory of Maranhão-Oswaldo Cruz Institute (LACEN); São Luís Brazil
3. Clinical Research Center; University Hospital, Federal University of Maranhão; São Luís Brazil
4. Kidney Disease Prevention Center; University Hospital and Department of Physiological Sciences, Federal University of Maranhão; São Luís Brazil
5. Department of Medicine I; Federal University of Maranhão; São Luís Brazil