Often variations can be found that do not have any known link to disease.

There is also a known link between cloud presence and climate change.

None had any known links to political parties or paramilitaries.

The officials were quoted as saying that the man had no known links to radical Islamic groups.

Detectives said there was no known link between his death and the other recent murders.

All the cases have occurred sporadically, with no known links between the patients, who range in age from 1 to 60.

In other cases, similar signs are found only among sign languages with known historical links.

Another victim, a 4-year-old boy who died in February, had no known link to the other three cases, they added.

The police said there was no known link between that incident and the attack Wednesday.

Oddly enough, he has no known links to the Buchanon family.