Duzen Laboratories Group, founded by Prof. Dr. Yahya Laleli in 1976, has earned a reputation as a national reference diagnostic center that operates in human, food, animal and environmental diagnosis fields, as well as in agriculture and agricultural biotechnology with its four companies: Duzen Laboratory; Duzen-Norwest Environment & Food Laboratories; Duzen-Norwest Veterinary Laboratory; Laleli Olive & Olive Oil Establishment.---Duzen Laboratory – is a pioneer institution in Turkey in clinical laboratory area since its foundation in 1976. Duzen offers a comprehensive suite of diagnostic services through its Clinical Laboratory (biochemistry, hematology, immunology, endocrinology, protein and specialized chemistry, microbiology, molecular biology and medical genetics) and Imaging Divisions (radiology, nuclear medicine, cardiology and EMG sections). Duzen serves over 1,000,000 patients/year and performs around 5 million tests that are mostly esoteric with its specialized doctors and laboratory staff. Clinical research services is also a major focus point in Duzen's health operations. Duzen is the first EN ISO/IEC 17025 accredited company in its field in Turkey and also holds an EN ISO 15189 accreditation.