Unplanned pregnancy in Brazil: national study in eight university hospitals by Tainá Vieira Nilson, Angélica Amorim Amato, Ceres Nunes Resende, Walquíria Quida Salles Pereira Primo, Roseli Mieko Yamamoto Nomura, Maria Laura Costa, Maria Lúcia Opperman, Marianna Brock, Alberto Trapani Junior, Lia Cruz Vaz da Costa Damasio, Nadia Reis, Vera Borges, Ana Cristina Araújo, Rodrigo Ruano, Alberto Carlos Moreno Zaconeta

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