{Reference Type}: Letter {Title}: Variable expressivity in Buschke-Ollendorff syndrome. {Author}: Salik D;Dupire G;Sass U;Dangoisse C;Franck D;Labadens A;Marangoni M;Vilain C;Smits G; {Journal}: Ann Dermatol Venereol {Volume}: 0 {Issue}: 0 {Year}: Sep 2021 9 {Factor}: 0.934 {DOI}: 10.1016/j.annder.2021.07.004 {Abstract}: