@article{10.1086/421592,
 ISSN = {00335770, 15397718},
 URL = {http://www.jstor.org/stable/10.1086/421592},
 journal = {The Quarterly Review of Biology},
 number = {1},
 pages = {68--68},
 publisher = {The University of Chicago Press},
 reviewed-author = {Tao  Jiang and Ying  Xu and Michael Q  Zhang},
 volume = {79},
 year = {2004}
}