Fig. 2

Arab map of CYP2D6*41 frequencies. A South-to-North CYP2D6*41 gradient frequencies were observed, as the highest frequency was found in the Arabian Peninsula Saudi Arabia (18.4%, dark blue) and lowest in North Levantine Syria (9.28%, light blue), and a similar trend of West-to-East gradient was exemplified by a higher frequency in Egypt (15.1%, dark blue) and lower prevalence in Algeria (8.3%, light blue)