A state-of-the-art assessment on the scientific evidence of wireless radiation impacts on children's health published in the journal Current Problems in Pediatric and Adolescent Health Care concludes that the medical community has a critical role to play to prevent harm from wireless radiation. Written by distinguished experts in medicine, epidemiology, toxicology, physics, biochemical engineering and public health ... the paper references numerous studies that associate wireless exposure to effects including oxidative stress, DNA damage, cardiomyopathy, carcinogenicity, sperm damage, memory damage and neurological effects. Pregnancy, infancy and childhood are periods of critical susceptibility, especially for the brain, which is rapidly developing. "Current government safety limits are outdated and do not reflect the latest science nor the way children use wireless technology today," stated Linda Birnbaum Ph.D, former Director of the National Toxicology Program. Theodora Scarato, Executive Director of Environmental Health Trust, highlighted the international policies to reduce children's exposure, such as France and Belgium's bans on the sale of cell phones designed for young children and the numerous countries that have restrictions on Wi-Fi exposure in classrooms. She stated that, "US government limits allow radiation emissions 10 to 100 times higher than numerous countries such as Switzerland, Italy, China, Russia and India."