Tìm kiếm thay thế:
"retrospective case-control study" » "retrospective _-control study", "retrospective single-control study", "retrospective case-controlled study"
"retrospective cohort-control study" » "retrospective cohort-controlled study"
"retrospective case-control study" » "retrospective _-control study", "retrospective single-control study", "retrospective case-controlled study"
"retrospective cohort-control study" » "retrospective cohort-controlled study"
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