Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (1111)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (11111)
Fundação de Amparo à Pesquisa do Estado de Minas Gerais (1212)
Received: 17 August 2017
Accepted: 12 January 2018
First Online: 24 January 2018
Ethics approval and consent to participate
: Two hundred samples of human nasopharyngeal aspiratewere also kindly provided by Laboratório Central do Estado do Rio Grande do Sul (LACEN/RS) (Table InternalRef removed). These samples were used underapproval of the ethics committee of Universidade Federal de Ciências da Saúde de Porto Alegre (protocol number 1774/12, register 928/12).
: Not applicable
: The authors declare that they have no competing interests.
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