Accepted for Publication: August 30, 2014.
Published Online: December 30, 2014. doi:10.1001/jamadermatol.2014.3513.
Study concept and design: Pascoe, Corey, Cheng, Kimball.
Acquisition, analysis, or interpretation of data: Pascoe, Enamandram, Corey, Cheng, Javorsky, Sung, Donahue, Kimball.
Drafting of the manuscript: Pascoe, Enamandram, Corey, Cheng, Javorsky.
Critical revision of the manuscript for important intellectual content: Pascoe, Enamandram, Corey, Cheng, Javorsky, Sung, Donahue, Kimball.
Statistical analysis: Pascoe, Enamandram, Corey, Donahue, Kimball.
Obtained funding: Pascoe.
Administrative, technical, or material support: Javorsky, Sung.
Study supervision: Cheng, Kimball.
Conflict of Interest Disclosures: Dr Sung received funding from Janssen Pharmaceuticals. No other disclosures were reported.
Funding/Support: This study was supported in part by funds from a National Psoriasis Foundation fellowship (Dr Sung) and from the Department of Dermatology, Massachusetts General Hospital, Harvard Medical School.
Role of the 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 are indebted to all of the faculty members of the Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, who participated in collection of PGA data.