Hidradenitis Suppurativa Area and Severity Index (HASI): a pilot study to develop a novel instrument to measure the physical signs of hidradenitis suppurativa

Affiliations

• ¹ Departments of Medicine and Dermatology, University of Minnesota, Minneapolis, MN, U.S.A.
• ² Departments of Medicine and Dermatology, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, U.S.A.
• ³ Welsh Institute of Dermatology, University Hospital of Wales, Cardiff, U.K.
• ⁴ Department of Dermatology, Zealand University Hospital, Roskilde, Denmark.
• ⁵ Department of Dermatology, University of Copenhagen, Copenhagen, Denmark.
• ⁶ Department of Dermatology, University of California San Francisco, San Francisco, CA, U.S.A.
• ⁷ Department of Medicine, Division of Dermatology, Women's College Hospital, University of Toronto, Toronto, ON, Canada.
• ⁸ The Rockefeller University, New York, NY, U.S.A.
• ⁹ Biostatistical Design and Analysis Center, Clinical and Translational Science Institute, University of Minnesota, Minneapolis, MN, U.S.A.