And scientists continue to debate whether probiotics offer a meaningful benefit to the immune system.
A more meaningful benefit is likely to be the fuel cell's superior efficiency.
Two appeals courts established a higher bar, calling for a "meaningful" benefit.
A spokeswoman for Roche insisted that many trials had shown that Tamiflu had a "clinically meaningful benefit for patients".
Especially when our imputation system means a cut in the corporate tax rate delivers no meaningful benefit for mum and dad investors," he said.
Prof. Paul Peterson of Harvard University, a voucher advocate, has conducted creative research on them but does not find what most observers would consider a meaningful benefit.
But before that could happen the F.D.A. would need more proof that the markers correlate with a meaningful benefit to patients, Dr. Lesko said.
Representative Peter A. DeFazio, Democrat of Oregon, said, "We could provide a much more meaningful benefit if we negotiated lower prices as other nations have done".
"The connection that's at risk is if you do business that significantly assists and provides some degree of service or meaningful benefit to the IRGC.
So, she said, the company views two hours of free access as a "meaningful benefit" for customers who buy a Starbucks card.
Whether that is a meaningful benefit, especially in light of some dangerous side effects, has split patient advocacy groups and the medical community.
