LINC01559 and pachyonychia congenita: Moreover, the stepwise multivariate Cox regression was utilized to establish a predictive signature for PC patients in the training cohort with a risk score = (0.319702425 × expression level of AC245041.2) + (−0.934877496 × expression level of AC125494.2) + (0.038664123 × expression level of LINC01559) + (−0.594425726 × expression level of AC090114.2) + (−0.110425977 × expression level of AC005332.6) + (−0.184537572 × expression level of AC092171.2) (Figure 1A).