https://www.smartmetersafeguard.com/frequently-asked-questions/safeguard-info/#1457638959044-dfc079f9-7955
Smart Meter Radiation – Distance:Safety (from SmartMeterSafeGuard.com)
https://www.smartmetersafeguard.com/frequently-asked-questions/safeguard-info/#1457638959044-dfc079f9-7955