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MLA Citation
Müberra Namli Kalem et al.. “Effect of combined oral contraceptive use on serum 25-hydroxy vitamin D levels and ultrasound parameters in patients with polycystic ovary syndrome.” Gynecological endocrinology, vol. 32, n.d., pp. 281–284. http://access.bl.uk/ark:/81055/vdc_100033980615.0x000009