Several years later, researchers discovered the exact cause of pellagra: a lack of the B vitamin known as niacin.

VOA: special.2009.01.27

He said girls in one Dakar school told him about a lack of bathrooms and textbooks for them, and bullying from boys.

VOA: special.2010.05.20

An official from Kenya, Adam Barre Duale,said it showed a lack of unity in the fight against hunger.

VOA: special.2009.11.23

Investigators blamed the destruction on the poor quality of many buildings and a lack of earthquake-resistant structures.

VOA: special.2011.01.04

Michael Breus says any tired driver is dangerous, but especially a teenager with a lack of experience.

VOA: special.2010.10.07

And a lack of physical activity among many Pacific islanders only adds to the obesity problem.

VOA: special.2010.08.23

That means their households, at some time during the year, had difficulty providing enough food for all members because of a lack of resources.

VOA: special.2009.11.23

The South was beginning to suffer from a lack of supplies and men for its armies.

VOA: special.2009.10.29

But some groups like Doctors Without Borders said patients in field hospitals were dying because of a lack of basic medical supplies like antibiotics.

VOA: special.2010.02.01

Even more die from a lack of food or water after swallowing pieces of plastic.

VOA: special.2009.09.22

That is a lack of Medicare coverage for some drug costs for older Americans.

VOA: special.2010.03.24

Signs of liver injury include nausea, vomiting and a lack of energy.

VOA: special.2009.07.08

The North was beginning to suffer from a lack of fighting spirit.

VOA: special.2009.10.29

Violence and a lack of a police department soon caused problems.

VOA: special.2009.02.04