5Keel BA.Quality control,quality assurance,and proficiency testing in the andrology laboratory[J].Arch Androl,2002,48(6):417-431.
6Keel BA,Quinn P,Schmidt CF Jr,et al.Results of the American Association of Bioanalysts national proficiency testing programme in andrology[J].Hum Reprod,2000,15(3):680-686.
7Keel BA.How reliable are results from the semen analysis[J] ?Fertil Steril,2004,82(1):41-44.
9Mahmoud AM,Depoorter B,Piens N,et al.The performance of 10 different methods for the estimation of sperm concentration[J].Fertil Steril,1997,68(2):340-345.
10Makler A.Standardization of counting chambers for sperm analysis[J].Fertil Steril,1997,67(5):978-979.