Novel heterozygous BPIFC variant in a Chinese pedigree with hereditary trichilemmal cysts oleh Xian‐Guo Fu, Zhao Huang, Su‐Juan Zhou, Jing Yang, Yun‐Juan Peng, Luo‐Yuan Cao, Hua Guo, Guang‐Hui Wu, Ying‐Hua Lin, Bao‐Ying Huang