Submitted for Publication: July 3, 2014; final revision received October 14, 2014; accepted October 17, 2014.
Published Online: December 4, 2014. doi:10.1001/jamaophthalmol.2014.5014.
Study concept and design: Powell, Hooper, Sheidow.
Acquisition, analysis, or interpretation of data: Li, Powell, Sheidow.
Drafting of the manuscript: Li, Sheidow.
Critical revision of the manuscript for important intellectual content: Li, Hooper, Sheidow.
Statistical analysis: Li.
Obtained funding: Powell, Sheidow.
Administrative, technical, or material support: Li, Powell, Sheidow.
Study supervision: All authors.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This study was funded by the Academic Health Science Center Alternate Funding Plan from the Academic Medical Organization of Southwestern Ontario.
Role of the Funder/Sponsor: The funder 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.