ARL6 and Bardet-Biedl syndrome: Four disease-causing mutations were associated with BBS; (M1): c.2258A > T, p. (Glu753Val) in BBS9 [37], (M2): c.68T > C; p. (Leu23Pro) in ARL6, (M3): c.265_266delTT; p. (Leu89ValfsTer11) and (M4): c.880T > G; p. (Tyr294Asp) in BBS12 while one disease-causing mutation was associated with USH; (M6): c.188A > C, p. (Tyr63Ser).