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thanks

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O.K. Thanks. Now I have quite a lot of material to read up on. Thanks
for your help rcd-ga. Also thanks to those who joined in the Comments.
I hope for some more comments too.

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Hello rcd!   Thank you for the fine job answering my question.

The information received gave no detail on the company about which I'd
asked.  Sadly, I already knew what you provided.  Appreciate the quick
response, though.

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Helpful.  I'm sure I'll be back for more...

The answerer certainly knows a lot of it. I didn't expect the parasite
load plays an import role. That is something to learn.

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