The researchers also found that keeping cellphones in shirt or pants pockets exceeds Federal Communications Commission exposure guidelines.
The study, published in the journal Electromagnetic Biology and Medicine, found the industry-designed process for evaluating microwave radiation from phones results in children absorbing twice the cellphone radiation to their heads, up to triple in their brain's hippocampus and hypothalamus, greater absorption in their eyes and as much as 10 times more in their bone marrow when compared with adults.
Devra Davis, L. Lloyd Morgan and Ronald B. Herberman, all of the Environmental Health Trust, a non-profit group that promotes health and preventing disease,along with Om P. Gandhi of the University of Utah, Alvaro Augusto de Salles of the Federal University of Rio Grande do Sul in Brazil and Yueh-Ying Han of New York Medical College say the FCC's test to determine radiation exposure falls short because it is based on a large tall man -- more than 200 pounds representing the top 10 percent of U.S. military recruits in 1989 -- whose 40 brain tissues are assumed to be exactly the same.
"A far better system relies on anatomically based models of people of various ages, including pregnant women, that can determine the absorbed radiation in all tissue types, and can account for the increased absorption in children," the researchers wrote in the study.
"It allows for cellphones to be certified with the most vulnerable users in mind -- children -- consistent with the 'As Low As Reasonably Achievable' approach taken in setting standards for using radiological devices."
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