51.   George said the finding shows the link between the two systems and raises the possibility that drugs could be developed to exploit it.

52.   He also attacked the United States for not taking enough notice of European scientific research which showed a link between hormones and cancer.

53.   No cause and effect link has been shown between ephedra and the deaths.

54.   Preliminary studies have failed to show a link, but countries are now turning to the WHO to conduct definitive research.

55.   Research has shown no link between the depleted uranium used in armor-piercing weapons and serious illnesses such as leukemia.

56.   Preliminary studies have failed to show a link, but countries where depleted uranium was used are now turning to the WHO to conduct definitive research.

57.   Similar links have been shown between fungus and trees.

58.   Several studies have suggested a connection, but others have shown no link.

59.   Study shows link between hormone and breast cancer.

60.   Studies have also shown a link between El Nino and cholera.