The study was praised as offering "an important insight into potential effects of cell phone radiation on the human brain" by Renee Sharp, director of the Environmental Working Group California office.

CNN: Cell phone exposure increases brain cell activity

After quitting a job as an executive director in the fixed-income group in the London office of Goldman Sachs, Sulger, now 33, moved to Shanghai knowing no Mandarin.

FORBES: Stand Out

Mark Schonfeld, director of the New York office, said his group wanted to make a "broad sweep" of the companies that seem to be targeted in the e-mails and heighten public awareness.

FORBES: Magazine Article

"It gives other companies breathing room in terms of the generation market, " says Tom Smith, director of the Texas office of Public Citizen, a watchdog group.

FORBES: TXU Has Competitors

She said the IPCC was discussing setting up a "challenge group" of independent people who can scrutinise the work of both the IPCC and the office of the Director of Public Prosecutions (DPP) to keep the families updated about the progress, independence and robustness of the work.

BBC: Hillsborough inquests date set for next week