Additional information
Funding
This work was mainly funded by ANRS (Agence Nationale de Recherche sur le Sida et les Hépatites Virales, France), [grant number 12203] and got additional funds from the following three sources: CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil), [grant number 300686/2013-7]; FAPERJ (Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Brazil), [grant number E-26/102.818/2012]; UERJ (Universidade do Estado do Rio de Janeiro, Brazil).