Seroprevalence of mumps, varicella and rubella antibodies in children 1-16 years of age in eastern Turkey - Metin Kaya Gürgöze; Erdal Yilmaz; Ahmet Gödekmerdan; Zehra Akça; Yaşar Doğan; Saadet Akarsu; A Denizmen Aygün (The Turkish Journal of Pediatrics)