Vianna, M. C., Teixeira, M. G., Beraldi, F., Bassani, I. S., & Andrade, L. H. (2009). São Paulo Megacity Mental Health Survey - A population-based epidemiological study of psychiatric morbidity in the São Paulo metropolitan area: Aims, design and field implementation. Revista Brasileira de Psiquiatria, 31(4), 375-386. doi: 10.1590/S1516-44462009000400016