I went long XLV in mid January 2007 for one of my personal IRA accounts. Its had its share of ups and downs but it doesn't take a rocket scientist, or a fancy neural net, to figure out that health care is a long term bet. If you don't believe me, look around for all the graying baby-boomers who want to desperately hold onto their youth.
This time I'm holding XLV for a very long time and won't be shaken out of it.
Disclosure: Long XLV