However, none of these blood tests for biological markers is as sensitive as screening questionnaires.

The tissue is sterilized so that the biological markers are removed, eliminating a response from the host's immune system.

All these "biological markers" occur after the period when embryos are destroyed by the extraction of stem cells, the issue now under debate.

In addition, a thoughtful choice of biological marker can be used as a signal to expect a whole host of ecological changes.

For that matter, they are not completely without biological markers.

It is a disorder that is defined according to behaviour as no specific biological markers are known.

Recent studies primarily focus on use of an autoantibody, not only for biological markers but for future treatment.

Whatever the cause, there are certain biological markers that those with the disorder frequently have in common.

Can we identify biological markers that might help guide psychological evaluation, treatment selection, and outcomes?

Some scientists have proposed that more than two dozen blood chemicals, taken together, act as biological markers and might be linked to aging.