Notes: There is a system of collection and storage of the data on the exposure of the population to main natural sources of radiation in Russia. It started in 2001 and is based on the statistical forms annually filled in using special software by any laboratory accredited for measurements of natural sources of radiation. The filled in forms are submitted to the regional databank (DB) operated by the regional body of Federal Service for Surveillance on Consumer Rights Protection and Human Well-being (Rospotrebnadzor), and all 85 regional DBs are submitted to the Federal DB of radiation doses to the public operated by the Institute of Radiation Hygiene. This DB contain the results of so-called routine measurements of radon which are taken in new buildings before their acceptance in operation or in existing (mainly public) buildings during surveillance actions. The results of separate radon surveys usually are not stored in the DB and are published separately in peer-reviewed journals.  