Dear Igor Thanks for your reply. I really need results of those investigations on real health studies.  Does any standard or guideline exist for this? If you or others have some information or can address some references about such investigations, please kindly mention.

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Dear Igor

Thanks for your reply.

I really need results of those investigations on real health studies.  Does any standard or guideline exist for this? If you or others have some information or can address some references about such investigations, please kindly mention.