A small study found a slightly increased risk of cancer and severe infections, but these results did not reach statistical significance.

Recent studies have found an increased risk of diseases other than lung cancer in passive smokers.

In some cases, the agency found a significant risk of cancer from the substances in water supplies.

One study found an increased risk for lung cancer.

Some studies have found an increased risk of miscarriage when either of these drugs is used.

Over the years, a few studies have in fact found a higher risk of suicide among police officers.

The study also found an excess risk in the workers for the specific symptoms indicative of asthma.

But previous studies had not found such a risk and experts said the new studies were inconclusive.

One study found an increased risk in need for dialysis and revascularisation.

Until recently, most studies had not found an increased risk of breast cancer from active tobacco smoking.