1 Hospital Sirio-Libanes, University of São Paulo Medical School, Rua Prof Daher Cutait, 69 Bela Vista, 01308-060 São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, Rua Prof Daher Cutait, 69 Bela Vista, 01308-060 São Paulo, Brazil. Electronic address: viviansilva87@gmail.com.
2 Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA.