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	1.	Hormonal male contraception in men with normal and subnormal semen parameters. [electronic resource] by Nieschlag, E Vorona, E Wenk, M Hemker, A-K Kamischke, A Zitzmann, M Producer: 20120306 In: International journal of andrology vol. 34 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Coiled sperm from infertile patients: characteristics, associated factors and biological implication. [electronic resource] by Yeung, C H Tüttelmann, F Bergmann, M Nordhoff, V Vorona, E Cooper, Trevor G Producer: 20090825 In: Human reproduction (Oxford, England) vol. 24 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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