1. Testicular ultrasonography and extended chromosome analysis in men with nonmosaic Klinefelter syndrome: a prospective study of possible predictive factors for successful sperm recovery 
Göran Westlander, M.D., Erling Ekerhovd, M.D., Ph.D., Seth Granberg, M.D., Lars Hanson, Charles Hanson, Ph.D., Christina Bergh, M.D., Ph.D. 
Fertility and Sterility 
Volume 75, Issue 6, Pages (June 2001)
DOI: /S (01)

2. Figure 1
Results of fluorescence in situ hybridization (FISH) of peripheral lymphocytes and buccal cells from 47,XXY men in whom sperm recovery after testicular sperm extraction (TESE) was successful compared with men in whom sperm recovery failed.
Westlander. Sperm retrieval and Klinefelter syndrome. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )