The prevalence in Caucasian populations is in the 0.1 % to 0.2 % range .
The prevalence in Caucasian populations may indicate that subjects originating from the sub-Saharan countries of Africa may be at higher risk of developing EOP .
The prevalence in Caucasian populations is in the 0.1 % to 0.2 % range and may indicate that subjects originating from the sub-Saharan countries of Africa may be at higher risk of developing EOP .