1.   Earlier research has suggested a link between grief and a weakened immune system.

2.   He suggested a link between class size and test results of seven-year-olds.

3.   Our results suggest a link between smoking and alcohol and complications of acid reflux in patients without hiatus hernias.

4.   But no link is suggested between them, and it is not yet clear what the point of the essay is.

5.   A strong link is thus suggested between the development of language and thinking.

6.   Both incidents have suggested links with travellers.

7.   Also, a protein called attractin is known to regulate both melanization and immunity in humans, suggesting a link between the two.

8.   Cahill also suggested a link between the continued use of torture and the poor training and meager resources available to law enforcement officials.

9.   Earlier studies had also suggested a link, the researchers said, but were too small to be definitive.

10.   He added that the data suggesting a link to breast cancer was mixed and controversial.