TNFSF14 and incontinentia pigmenti: As shown in Fig 1a and Table 2, the median levels (range) of serum LIGHT were 119 (16–335.4) in DM-IP patients (n = 19), 80.4 (39.9–90.2) in DM patients (n = 5), and 41.7 (21–97.2) pg/ml in the age-matched HC (n = 5).