The effect of long-term radiofrequency exposure on cognition in human observational studies: A protocol for a systematic review

•This protocol outlines the steps required for a systematic review of the effect of long-term radiofrequency exposure on cognition in human observational studies.•The protocol allows for an assessment of possible cognitive effects due to RF-EMFs from personal, environmental and occupational exposure.•The protocol follows the best methodology for synthesis and risk of bias assessment for RF-EMF exposure and cognition in human observational studies.