Cecatti JG, Souza JP, Parpinelli MA, Haddad SM, Camargo RS, Pacagnella RC, Silveira C, Zanardi DT, Costa ML, Pinto e Silva JL, Passini R Jr, Surita FG, Sousa MH, Calderon IM, Say L, Pattinson RC; Brazilian Network for Surveillance of Severe Maternal Morbidity.
Reprod Health. 2009 Sep 24;6:15.