BTG2 and pachyonychia congenita: The expression heat map of http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE41369 is shown in Figure S3, and the expression of hsa‐miR‐27a in http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE28955 is illustrated in Figure 1G. Based on the aforementioned results, we speculated that miR‐27a could regulate BTG2 in PC.