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2. Coburn M, Kim ED, Wheeler TM: Testicular biopsy in male infertility evaluation; in Lipshultz LI, Howards SS (eds): Infertility in the Male, ed 3. St. Louis, Mosby, 1997, pp 219-248.
3. In vitro fertilization outcomes after intracytoplasmic sperm injection with fresh or frozen-thawed testicular spermatozoa