Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Several double-blind experiments suggest that people who say they have EHS ca n't detect if electromagnetic fields are present , and are just as likely to report feeling sick after a phony exposure as they are after real exposure , making scientists think it is the nocebo effect .

Since then , several double-blind experiments have shown that people who report electromagnetic hypersensitivity are unable to detect the presence of electromagnetic fields and are as likely to report ill health following a sham exposure as they are following exposure to genuine electromagnetic fields , suggesting the cause in these cases to be the nocebo effect .