“Evaluation of the Genotoxicity of Cell Phone RFR in Male and Female Rats and Mice following Subchronic Exposure,” Environmental and Molecular Mutagenesis, posted October 21, 2019.
From the NTP: "[S]ignificant increases in the levels of DNA damage measured by the comet assay were seen in several tissues from rats and mice, indicating that RFR may be capable of causing increases in DNA damage.” More here and here.