Footnotes

• Twitter @ritapineda_6, @sactMD

• Contributors RAPS and DAGD provided the idea and performed the study design. RAPS, GSP and SACT performed the data analysis, interpretation and drafting of the manuscript. RAPS, GSP, DAGD, JAEV, DEFA and IDJHG helped in data acquisition and revised the manuscript for important intellectual content. All authors critically revised and approved the final version of the manuscript.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.

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