Liver ultrasound elastography for the evaluation of periportal fibrosis in schistosomiasis mansoni: A cross-sectional study. oleh Joelma Carvalho Santos, Andrea Dória Batista, Carla Maria Mola Vasconcelos, Roberto Souza Lemos, Valter Romão de Souza Junior, Alain Dessein, Hélia Dessein, Silvia Maria Lucena Montenegro, Edmundo Pessoa Almeida Lopes, Ana Lúcia Coutinho Domingues