The same comparable findings can be seen when analyzing the second most frequent allele in our cohort, HLA-A*01:01:01 (AF 12.5%), in this frequency range being found, again, were populations such as the Russian Belgorod and Vologda Regions populations (AFs of 9.5% and 10.5%), Brasilian Caucasians (AF approximately 10%), the Spanish Canary Islands population (AF 10.5%), and Polish or USA Caucasians (both with AFs of approximately 14%), but also other populations, such as Moroccan or South African Indian (AFs of 13% 14%) [15]. This evidence concerns the gene HLA-A and atrial fibrillation.