More recently, Corrêa et al., (2018) suggested a 330 kb region of susceptibility to convulsions and microcephaly in the terminal 4p16.3 encompassing seven genes LETM1, FGFR3, WHSC1, NELFA, C4orf48, NAT8L, and POLN. Here, NICOL1 is linked to microcephaly.