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one important cohort study is the life span study of the survivors of the atomic bombings of hiroshima and nagasaki.
٤٥ - ومن الدراسات الفوجية الهامة دراسة المدى العمري، التي أجريت على الناجين من قصف هيروشيما وناغازاكي بالقنابل الذرية.
non-ulcerative sexually transmitted diseases as risk factors for hiv-1 transmission in women: results from a cohort study.
non-ulcerative sexually transmitted diseases as risk factors for hiv-1 transmission in women: results from a cohort study.