Footnotes

• Contributors All authors were contributors to the study design, analysis and manuscript writing process to varying degrees. AMK was involved in study concept and design, IRB process/approval, data collection, manuscript revision. GK was involved in IRB process/approval, manuscript drafting. MP was involved in data collection, data analysis, manuscript revision. HG was involved in study concept and design, IRB process/approval, data analysis, manuscript drafting, manuscript revision.

• Competing interests None declared.

• Ethics approval MedStar Washington Hospital Center Institutional Review Board.

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