1. WHO Manual for the standardized investigation and diagnosis of the infertile couple;World Health Organization,2000
2. World Health Organization reference values for human semen characteristics;Cooper;Hum Reprod,2010
3. Withered yang: a review of traditional Chinese medical treatment of male infertility and erectile dysfunction;Crimmel;J Androl,2001
4. Evaluation of prevalance of infertility in Buenos Aires (BA) through a male questionnaire;Knoblovits,2009
5. Medical treatment of idiopathic oligozoospermia and male factor subfertility;Adamopoulos;Asian J Androl,2000