GlaxoSmithKline (GSK) said it is investigating claims of bribery in its Iraq business. The drugmaker has been accused of hiring government-employed physicians and pharmacists in Iraq as paid sales representatives to improperly increase use of its products.We are investigating allegations of improper conduct in our Iraq business. We have zero tolerance for unethical or illegal behaviour," a company spokesman said.It is not the first time the company has been embroiled in bribery allegations. In July, Chinese authorities accused the group of paying up to 3bn yuan to doctors and officials to encourage them to use its medicines. RD