title: Survey of the literature for march 2015 issue of sexual medicine journal.
references.citation: J Sex Med. 2013 Jun;10(6):1488-501
references.pmid: 23551591
references.citation: Proc Natl Acad Sci U S A. 2014 Jul 1;111(26):E2731-40
references.pmid: 24979788
references.citation: Neuron. 1996 Aug;17(2):353-61
references.pmid: 8780658