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Fig. 1

Fig. 1. Flow diagram of patient selection.. From: Prior uterine myoma and risk of ovarian cancer: a population-based case-control study.

ICD-9-CM, International Classification of Diseases, 9th revision, clinical modification; NHIRD, National Health Insurance Research Database.

Jenn-Jhy Tseng, et al. J Gynecol Oncol. 2019 Sep;30(5):e72.

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