Gürgöze, Metin Kaya, et al. “Seroprevalence of Mumps, Varicella and Rubella Antibodies in Children 1-16 Years of Age in Eastern Turkey”. The Turkish Journal of Pediatrics, vol. 48, no. 3, July 2006, pp. 185-8, https://doi.org/10.24953/turkjpediatr.2006.2627.