Grimberg, Alexandre, David Carlos Shigueoka, Álvaro Nagib Atallah, Sergio Ajzen, and Wagner Iared. 2010. “Diagnostic Accuracy of Sonography for Pleural Effusion: Systematic Review”. São Paulo Medical Journal 128 (2):90-95. https://periodicosapm.emnuvens.com.br/spmj/article/view/1733.