Although there is a definite relationship between lung function and vitamin D, it is unclear if increases in vitamin D through supplements or dietary intake will actually improve lung function in patients with chronic respiratory diseases.

The difference in lung function between the highest and lowest quintiles of vitamin D is substantial and greater than the difference between former and nonsmokers.

Although the reasons for the rise in deaths when a parent sleeps with their infant on a sofa are unclear, we strongly recommend that parents avoid this sleeping environment.

now she has, although it's a difficult relationship.

We know that second-hand smoking increases the risk of lung cancer and studies have suggested that it is associated with lung cancer mortality. But this is the first study to show that second-hand smoking also is associated with lung cancer survival.

We see slippage in retail construction as a function of increases in energy costs, which cuts into discretionary spending.