The normal distribution of PRNP codon 129 polymorphism in the Moroccan population (Arabs and Casablanca residents) - Nadifi, S.; Slassi, I.; Hachimi, K.M. El; Gazzaz, B.; Bellayou, H.; Raddaoui, K.; Laplanche, J.L. (Pathologie Biologie, 2008)