Inclusion criteria:  Informed Consent 18 years or older at the time of informed consent  With all these criteria :  the perception by the subjects of various non-specific functional symptoms the absence of clinical and biological evidence to explain the symptoms the attribution by the subjects themselves of these symptoms to exposure to electromagnetic fields, which are themselves diverse the symptoms are chronic (more than 3 months) the symptoms appear during an exposure to a source of electromagnetic radiation and cease after the exposure is stopped the symptoms are reproducible  Exclusion criteria:  - age under 18 years old