To be clear, no single study would disprove all forms of free will.

No single study can answer all these questions, but this trial offers some useful data to contribute in the debate.

This was a single small study that needs to be confirmed.

Sound health advice is generally based on research over time, not a single study touted by the media.

Those numbers usually come from single studies that indeed demonstrate an abortion rate around 90%.

The reason, he said, was that the population in any single study would be too small.

Both types of report may therefore emerge from a single study.

"It may be the best single study available," he said, in terms of methodology.

Not a single medical study has looked at the program or compared it to other popular diets.

A further ten physical signs were evaluated in single studies.