IL17A and alopecia areata: ‘IL2RA AND polymorphism AND mutation AND variant AND“Alopecia Areata’’ AND (mutation OR variant OR polymorphism)’‘IL17A AND polymorphism AND mutation AND variant AND“Alopecia Areata’’ AND (mutation OR variant OR polymorphism)’‘IL12B AND polymorphism AND mutation AND variant AND“Alopecia Areata’’ AND (mutation OR variant OR polymorphism)’‘IL23R AND polymorphism AND mutation AND variant AND“Alopecia Areata’’ AND (mutation OR variant OR polymorphism)’