Published Online: August 21, 2014. doi:10.1001/jamaoto.2014.1663.
Study concept and design: Hillel, Ding, Elisseeff, Horton.
Acquisition, analysis, or interpretation of data: Hillel, Namba, Ding, Pandian, Horton.
Drafting of the manuscript: Hillel, Ding.
Critical revision of the manuscript for important intellectual content: Namba, Pandian, Elisseeff, Horton.
Statistical analysis: Hillel, Ding, Pandian.
Obtained funding: Hillel.
Administrative, technical, or material support: Hillel, Elisseeff.
Study supervision: Hillel, Elisseeff, Horton.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was financially supported by a Triological Society Career Development Award and The Johns Hopkins FAMRI Center of Excellence.
Role of the Funder/Sponsor: The funding institutions had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We would like to thank Peter Belafsky, MD, PhD, for his guidance and critical review of the manuscript.