Ureña-Paniego, Clara, Marta Gamissans-Cañada, Alejandro Molina-Leyva, and Jorge Romaní. 2023. “Pilonidal Sinus Disease Is Associated With Severe Hidradenitis Suppurativa in a Spanish Cohort”. Acta Dermato-Venereologica 103 (September):adv6569. https://doi.org/10.2340/actadv.v103.6569.