I'll see if I can find it. I know just the study you are talking about, Nancy. I'm sure it is somewhere in the diagnostic thread. I'll post back. Nancy, I think I also went back and edited into that infamous thread when I ran across the study about dropping antibody levels. Whatever is faster to find....lol!

I think one or two weeks would be ok, but any longer and you'd be left questioning results.

I think the study showed significant drops by the third month. But, my memory is foggy.

Cara