American researchers used a national long-term survey of adolescent health to investigate the link between media use and depression.

VOA: special.2009.03.10

Arthritis can be caused by injury,infection, an autoimmune disease or just long-term use.

VOA: special.2010.05.19

Long-term use can produce unwanted effects in some people.

VOA: special.2009.04.07

Doctors use such databases to monitor the long-term well-being of patients undergoing many kinds of treatments.

VOA: standard.2010.01.01

"President Obama has made it a clear commitment to revolutionize the way that we use energy, including mandatory cap and trade legislation, long-term submissions reductions goals and a commitment to renewable energy technologies,"

VOA: standard.2009.08.31