title: Efficacy of internal and external quality control in chemical pathology.
authors.forename: R
authors.initials: R
authors.lastname: Lalani
authors.forename: M N
authors.initials: MN
authors.lastname: Zafar
authors.forename: M
authors.initials: M
authors.lastname: Khurshid
mesh_terms: D001774:Blood Chemical Analysis / Q000295:instrumentation / Q000592:standards*; D006801:Humans; D010154:Pakistan; D011786:Quality Control