This study has just been published: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0082996 Cary *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html