Assessment of hepatitis E seropositivity among HIV-infected patients in Bulgaria Elitsa Golkocheva-Markova; Ani Kevorkyan; Ralitsa Raycheva; Chiydem Ismailova; Viliana Yoncheva; Tencho Tenev; Radoslava Emilova; Lyubomira Grigorova; Ivan Baltadzhiev; Radka Komitova;