National Institute of Environmental Health Sciences- National Institute of Health (U.S.) "Studies conducted in the 1980s showed a link between magnetic field strength and the risk of childhood leukemia. After reviewing more than two decades of research in this area, NIEHS scientists have concluded that the overall pattern of results suggests a weak association between increasing exposure to EMFs and an increased risk of childhood leokemia." "The few studies that have been conducted on adult exposures show no evidence of a link between residential EMF exposure and adult cancers, ..... Based on these reviews, the NIEHS recommends continued education on practical ways of reducing exposures to EMFs."
In other words, erring on the side of caution is understandable.