1.   We shall explore how these factors interact more fully below.

2.   But just how genetic, organic and social factors interact is not at all clear.

3.   Many factors often interact to create different levels of disease severity among ethnic groups, Kurtz said.

4.   Raine said the study was the first clear demonstration of how biological factors may interact with social factors to induce violence.

5.   The study found that personal and situational factors interact to produce air transit stress, Bricker said.