Footnotes

• Contributors All authors have made substantial contributions to the conception or design of the work, or the acquisition, analysis or interpretation of data; drafting the work or revising it critically for important intellectual content and have approved the final work.

• Funding This study was funded by Johns Hopkins - Kaiser Permanente Collaborative Pilot Program.

• Competing interests None declared.

• Patient consent Not required.

• Ethics approval Mid-Atlantic Permanente Research Institute, Johns Hopkins University School of Medicine.

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