this surprised me a bit as well.. it seems like: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T0K-45FP7C1-1&_user=964951&_rdoc=1&_fmt=&_orig=sear

this surprised me a bit as well.. it seems like: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T0K-45FP7C1-1&_user=964951&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000000593&_version=1&_urlVersion=0&_userid=964951&md5=c37c53fe89aad47f022dadc1c0aea3e6 http://www.sciencedirect.com/science?_ob=ArticleURL&_udi... is likely the case, and it makes some sense if she's incessantly scratching the same area over a year.. (I didn't buy the pdf, but the abstract explains it)