From the ∗Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL
†Department of Dermatology, George Washington University School of Medicine and Health Sciences, DC.
Address reprint requests to Jonathan I. Silverberg, MD, PhD, MPH, Department of Dermatology, Suite 2B-430, 2150 Pennsylvania Ave, George Washington University School of Medicine, Washington, DC 20037. E-mail: [email protected].
The authors have no conflicts of interest to declare.
This publication was made possible with support from the Dermatology Foundation.
J.I.S. had full access to all the data in the study and takes responsibility for the integrity of the data and accuracy of the data analysis, participated in the study concept and design and in the study supervision, and obtained funding. C.M. and J.I.S. participated in the acquisition of data, analysis and interpretation of data, drafting of the article, critical revision of the article for important intellectual content, and statistical analysis.