ROCKVILLE, MdThe FDA and the Cellular Telecommunications Industry Association (CTIA) have joined in a collaborative effort to examine the potential health effects of wireless telephones. FDA will provide research recommendations and oversight. CTIA will fund the studies, which will be done over the next 3 to 5 years by researchers who are not connected with FDA or the industry. Initial studies will focus on whether radiofrequent emissions from wireless phones pose any health threat. They will include both laboratory work and studies of mobile phone users.