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APA Citation
Artini, P. G., Papini, F., Ruggiero, M., Scaravelli, G., Di Berardino, O. M., Simi, G., & Cela, V. (2011). difficult-to-treat women for controlled ovarian hyperstimulation: tips and tricks. Expert review of endocrinology & metabolism, 6(4), 617–627. http://access.bl.uk/ark:/81055/vdc_100117908207.0x00001e