Footnotes

• Twitter @dr_tgro, @James_kim_md, @veenagraffmd, @EMARIANOMD, @nelkassabany

• Contributors TG did the data collection, organized the data, and contributed to the study design, writing the manuscript. He edited the manuscript and approved it. JK and VG contributed to the study design, writing the manuscript. He edited the manuscript and approved it. ERM and NME contributed to the study design, data analysis, writing the manuscript. He edited the manuscript and approved it.

• 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.

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