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2. Ambulatory surgery in the United States, 2006;Cullen;Natl Health Stat Report,2009
3. Estimating the number of vasectomies performed annually in the United States: data from the National Survey of Family Growth;Eisenberg;J Urol,2010
4. Current contraceptive use in the United States, 2006–2010, and changes in patterns of use since 1995;Jones;Natl Health Stat Rep,2012
5. Tubal sterilization trends in the United States;Chan;Fertil Steril,2010