Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (302584/2015-3)
Foundation for Scientific and Technological Development in Health (PRES-012-FIO-16)
Received: 6 April 2020
Accepted: 6 October 2020
First Online: 14 October 2020
Ethics approval and consent to participate
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This work was approved by the Human Research Ethics Committee of the State University of Pará (Opinion No. 1.868.004/CAAE: 62348616.4.0000.5174) and all donors were informed of their participation in this research project by signing the Term Free and Informed Consent (EHIC) and all the privacy rights were observed.
: Not applicable.
: The authors declare that they have no competing interests.