Conversely, SLITRK1 missense mutations have been reported in trichotillomania (R584K, S593G; Zuchner et al., 2006) and obsessive–compulsive disorders (OCD; N400I, T418S; Figure 1A; Table 1; Ozomaro et al., 2013). This evidence concerns the gene SLITRK1 and trichotillomania.