Hepatitis C genotype 4: genotypic diversity, epidemiological profile, and clinical relevance of subtypes in Saudi Arabia Research Authors Al Ashgar Hamad I, Khan Mohammed Q, Al Ahdal Mohammed, Al Thawadi Sahar, Helmy Ahmad Salem, Al Qahtani Ahmed, Sanai Faisal M Research Department Department of Gastroenterology and Tropical Medicine Research Journal Saudi Journal of Gastroenterology Research Member Ahmed Helmy Salem Abo Elela Research Year 2013