Original sentence: Citing these findings the FDA issued a press release in July 2009 strongly discouraging the use of electronic cigarettes and repeating previously stated concerns that electronic cigarettes are marketed to young people and lack appropriate health warnings.Of the 18 varieties of cartridge tested by the FDA, one was found to contain diethylene glycol (DEG) in a 1% concentration.Trace amounts of tobacco-specific nitrosamines (TSNA) were detected in cartridges with higher nicotine content
Edited sentence: Diethylene glycol and tobacco-specific nitrosamines were detected in some of the cartridges tested.In July 2009, the FDA issued  a press release discouraging the use of electronic cigarettes and repeating previously stated concerns that electronic cigarettes are marketed to young people and lack appropriate health warnings