WEDNESDAY, June 4 (HealthDay News) -- U.S. health officials have started a safety review of a class of drugs known as tumor necrosis factor (TNF) blockers, which are widely prescribed to treat autoimmune disorders such as rheumatoid arthritis, juvenile rheumatoid arthritis and Crohn's disease.

The announcement did not come as a surprise, as experts have long debated the risk-benefit profile of the drugs without coming to any consensus.

FRIDAY, Feb. 22 (HealthDay News) -- The U.S. Food and Drug Administration has approved Humira (adalimumab) to treat moderate-to-severe juvenile idiopathic arthritis (JIA) in children aged four years and older, maker Abbott Laboratories said Friday.