Han L, Rao L, Wu Y- bo, Deng Y- yi, Luo B. Hair Collar Sign with Naevus Flammeus: a Possible Sign of Aplasia Cutis Congenita. Dermatol Pract Concept [Internet]. 2025 Oct. 7 [cited 2025 Oct. 19];15:6116. Available from: https://dpcj.org/index.php/dpc/article/view/6116