Sigma metric performances of Capillarys 3 Tera and Premier Hb9210 HbA1c analysers and comparison of conventional laboratory quality control practice with risk-based statistical quality control procedureZeynep Yildiz Dilara Turanlı Metin Alemdar Asuman Orçun Department of Biochemistry Laboratory, Kartal Dr. Lütfi Kırdar City Hospital, İstanbul, Turkeyon January 31, 2026 at 2:42 am