1.   Social factors have played their part in the Decline in family sizes.

2.   The authors concluded that genetic factors play a major role in the etiology of alcoholism in women.

3.   These factors play a significant role in determining how long it will take to train a network.

4.   Undoubtedly, political and economic factors have played their part.

5.   But the conference heard equally strong evidence for the role that environmental factors play in creating genius.

6.   This may indicate that other factors also play an important role in increasing hepatic venous pressure gradient in acute liver failure.

7.   Therefore all immunosuppressive factors can play a part.

8.   The environmental factor is playing well with mills and converters...

9.   Although the exact cause is unknown, studies show that biological and psychological factors play a role.