Of principal interest are those causal mechanisms, which indicate genetic control over environmental exposure.

Three causal mechanisms giving rise to gene-environment correlations have been described.

The nature of the causal mechanism is however less well understood.

Since we're studying causal mechanisms, you can't say things are free from international causation.

This type of sensitization has been suggested as a possible causal mechanism for chronic pain conditions.

It has been suggested that these eye symptoms are related to different causal mechanisms.

The causal mechanism and direction of causation is unknown.

This is in addition to examining the causal mechanisms that connect one variable to another.

As Einstein also found, neither this nor any other causal mechanism can work at faster than light speed.

These findings are correlational, and causal mechanisms were not directly tested.