11.   What about aggressive behaviour then, what choose to use that?

12.   Boys are constitutionally more predisposed to the development of aggressive behaviour than are girls.

13.   Kelly plays Dr. Jeannie Ferrami, an inquisitive biologist at a prestigious university who is trying pinpoint the gene that leads to aggressive behaviour.

14.   Many attempts were undertaken in the very recent past by concerned parties to bring about a cessation to these debilitating aggressive behaviour in the serene world of academia.

15.   Ten per cent showed suicidal tendencies while others had diffculty concentrating, were excessively talkative or withdrawn, showed aggressive behaviour, and were having nighmares and flashbacks.

16.   Growth hormones are used by bodybuilders, but their unregulated use can cause cardio-vascular illness, diabetes and aggressive behaviour.

17.   Commentators said Howard, who is not constrained by a reputation for aggressive behaviour, gave a feistier, more confident performance, which could lift his standing.

18.   There are half a dozen like him, locked up in narrow, ill-lit cells because of their aggressive behaviour.

19.   There are side effects, including strokes, dysfunction of genitalia, aggressive behaviour and heart and liver damage.

20.   Police said he had never shown any aggressive behaviour and had no police record.