However, based on clinical evidence, such effects could not be demonstrated.

Even so, clinical evidence of a serious health problem surfaced not long after the attack.

However, there is no clinical evidence to support its usefulness.

However, there has been no reliable clinical evidence to support such a claim.

With one exception, however, there is limited clinical evidence of their benefit.

Even assuming this were possible, there's no clinical evidence that it makes a difference.

"But there wasn't any clinical evidence of her tumor," David said.

There must also be supporting clinical evidence such as needle marks on the arms.

There is some clinical evidence to support this strategy, Yoder says.

Again, such clinical evidence only implies that this region is critical to color perception, and nothing more.