1.   And so far, the weight of the scientific evidence is that nerve gas does not cause the ailments reported by many veterans.

2.   But he acknowledged that it was sometimes difficult to offer helpful information to veterans, given the confusion about what is causing their ailments.

3.   Like Kaiser Permanente, Wellpoint will pay only for erectile dysfunction claims of men whose ailment is caused by a physical illness.

4.   One of the new rules addresses contamination from microbes like Cryptosporidium, an organism carried by animal wastes that causes intestinal ailments when people drink contaminated water.

5.   Ozone, or smog, causes respiratory ailments and aggravates chronic conditions such as asthma, heart disease and emphysema.

6.   Perlegen chief executive Brad Margus said these comparisons will begin to identify and explain how minute differences in the chemical sequence of DNA indicate or cause various ailments.

7.   Ozone levels that exceed federal safety limits can cause respiratory ailments and exacerbate asthma, heart conditions and other chronic maladies, according to numerous health studies.

8.   Rickets, a treatable bone ailment caused by malnutrition and a lack of vitamin D, is usually seen in developing countries.

9.   Repetitive motions and awkward postures at work can cause such ailments of the muscles, nerves, joints, cartilage, blood vessels or spinal discs.

10.   The study says that this pollution consists of fine particles of substances like sulfur dioxide and nitrogen oxides, which can cause respiratory ailments, including lung cancer.