Question:
The names of the companies are confidential and were not known to the researchers.

Does it follow that "The researchers were not aware that Walmart, CVS and Walgreen's were participants. "?
Answer:
it is not possible to tell

Question:
That in turn could--most likely would--trigger another round of devaluations in Asia and set back the region's recovery.

Does it follow that "Asia's valuation will always remain strong no matter what happens."?
Answer:
no

Question:
Expect a torrent of foodstuff in tubes.

Does it follow that "Expect a bunch of your favorite foods in tubes."?
Answer:
it is not possible to tell

Question:
But ask Miss Tuppence if she also has not had her suspicions." Jane turned mutely to Tuppence.

Does it follow that "Jane said Tuppence has never had any suspicions."?
Answer:
no