title: New frontiers in nonhormonal male contraception.
authors.affiliation: Center for Biomedical Research, Population Council, 1230 York Avenue, New York, NY 10065, USA. y-cheng@popcbr.rockefeller.edu
authors.forename: C Yan
authors.initials: CY
authors.lastname: Cheng
authors.forename: Dolores D
authors.initials: DD
authors.lastname: Mruk