<unk>  is mainly found in arid countries of the eastern Mediterranean region and in West Africa, where it is known as sahel.
Bejel epidemiology and demographics
Bedwetting epidemiology and demographics
Drug allergy epidemiology and demographics
Haff disease epidemiology and demographics
Eczema epidemiology and demographics
Boil epidemiology and demographics
Syphilis epidemiology and demographics
Soy allergy epidemiology and demographics