Development and validation of the International Hidradenitis Suppurativa Severity Score System ( <scp>IHS</scp> 4), a novel dynamic scoring system to assess <scp>HS</scp> severityChristos C. Zouboulis, Alexa B. Kimball, Αthanassios Kyrgidis et al.|British Journal of Dermatology|2017Cited by 467