University of Sao Paulo, Sao Paulo, Brazil
Cristina Silva Sousa, Sao Paulo, Brazil
Post Graduate Program of Maternal and Child Health, Sao Luis, Maranhao, Brazil
University Hospital of sao paulo, São Paulo, Brazil
Samaritan Hospital, São Paulo, Brazil
Faculdade de Medicina de Botucatu, Botucatu, São Paulo, Brazil
Hospital Municipal Carmino Caricchio, Sao Paulo, Brazil
Clinical Hospital of Medical College of Ribeirão Preto (HCFMRP), Ribeirão Preto, São Paulo, Brazil
Hospital Das Clínicas Da Faculdade de Medicina de Ribeirão Preto -Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil