Han, Li, Lang Rao, Yong-bo Wu, Yan-yi Deng, and Bo Luo. “Hair Collar Sign With Naevus Flammeus: A Possible Sign of Aplasia Cutis Congenita”. Dermatology Practical & Conceptual 15, no. 4 (October 31, 2025): 6116. Accessed April 21, 2026. https://dpcj.org/index.php/dpc/article/view/6116.