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An Overview of Knowledge and Attitude About Premenstrual Syndrome on 9th Grade Students at Junior High School Number 1 West Selemadeg. JKK [Internet]. 2025 Oct. 31 [cited 2025 Nov. 3];8(1):1-15. Available from: https://ejournal.medistra.ac.id/index.php/JKK/article/view/2788