Magnetic fields (MF) of 50 Hz at 1.2 microT as well as 100 microT cause uncoupling of inhibitory pathways of adenylyl cyclase mediated by melatonin 1a receptor in MF-sensitive MCF-7 cells. Ishido M, Nitta H, Kabuto M Carcinogenesis. Jun 2001 (DOI : 10.1093/carcin/22.7.1043)