We had quite a few of these during the months of Jan and Feb. Quite a few of our patients are on ACE inhibitors, so I'm wondering if this may be playing a role in this situatiuon. We hadn't thought about the COLD angle, but will definately remember this next winter, if we see this again. Thought it might have been a lot# issue on the ECHO??? Didn't like the gel because of the rouleaux rxs, now don't know what to make of this solid phase issue???