Infections,smoking and using your voice too much, too loudly or just incorrectly can all cause hoarseness.

VOA: special.2009.09.02

Or they incorrectly use articles such as "a", "an" and "the."

VOA: special.2009.04.30

Studies indicate up to in Britain are diagnosed incorrectly or have ailments that are overlooked.

VOA: standard.2009.09.24