Others cite similar concerns over the financial stake in such research.
But the administration shifted course and killed the program in 2008, citing concerns about the costs.
Executives at both companies cited concerns about its political content.
He cited growing concern for his daughters and general fatigue from the industry.
Others believe that it is premature, citing concerns about human rights.
At the last moment, the government canceled the trip, citing security concerns.
Neither company agreed to an interview for this article, citing security concerns.
Stock prices fell, with some analysts citing concerns over the economy.
Stores have pulled his products, citing concerns about the literature.
American Home cited unresolved concerns about the safety of the drug.