Footnotes

• Contributors RL, RLdP, PAdC, ILF, CLV and IV contributed to study concept and design. RAG was responsible for the statistical analysis. RAG and RL revised the manuscript for intellectual content. All authors approved the final version of the manuscript.

• Funding Fundação de Amparo a Pesquisa do Estado de Goiás, Brasil; process no 201200661660420.

• Competing interests None.

• Patient consent Obtained.

• Ethics approval University Federal of Goiás.

• Provenance and peer review Not commissioned; internally peer reviewed.