1.   Most multiple sclerosis patients suffer periodic attacks of inflammation of central nervous system tissue, during which they can lose the ability to move, talk and even breathe.

2.   Despite the end of the war, many armed gangs still operate in Chechnya outside the control of the separatist government and have been blamed in periodic attacks.

3.   Even though many Madurese moved to Borneo decades ago or were born on the island, they have been subject to suspicion and periodic attacks by the indigenous people.

4.   Hezbollah has since carried out periodic attacks over Chebaa Farms, a patch of disputed land still under Israeli control.

5.   Large portions of the railroad are closed as the rebels mount periodic attacks on the line.

6.   Mayors in the border towns have repeatedly complained that, aside from Lebanese guerrillas launching periodic Katyusha rocket attacks, the government ignores their economic problems.

7.   Northern Iraq is even more volatile thanks to periodic attacks by Turkey, which pursues its own rebellious Kurds when they retreat into the rugged mountains across the border.

8.   Russia announced it will no longer tolerate periodic attacks against its troops along the Chechen border, and has launched several strikes against suspected assailants.

9.   Russian forces guarding borders with Chechnya have been the targets of periodic attacks since the republic won de facto independence in the war.

10.   Since the collapse of communism, there have been periodic anti-Semitic attacks in Hungary.