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Schindler AE. In J Endocrinol Metab.2013. Šimunić, 2008. Schindler AE. In J Endocrinol Metab.2013 Fraser IS. Contraception . 2010 ACOG Guidelines , 2010.
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Schindler AE. In J Endocrinol Metab.2013 FraserIS. Contraception. 2010 ACOG Guidelines, 2010