TY - JOUR IS - 4 JA - J Radiol Prot JO - Journal of Radiological Protection PY - 2012 SN - 0952-4746 VL - 32 AU - Swanson J AU - Kheifets L DO - 10.1088/0952-4746/32/4/413 LA - en N1 - FEMU ID: 21280; EMF-Portal URL: https://www.emf-portal.org/en/article/21280 SP - 413-418 TI - Could the geomagnetic field be an effect modifier for studies of power-frequency magnetic fields and childhood leukaemia? ER -