57 participants (35 women) were randomly assigned to one of three different exposure scenarios with three exposure levels (low, medium, high). Hypersensitive individuals were neither actively recruited, nor excluded from the tests.
Distance between exposed object and exposure source
The experiments took place in an adapted room in a kindergarten. Participants sat on a comfortable wooden chair at 6 m from the GSM-900 omni antenna mounted on the facade of the building and behind a gap in the shielding carbonaceous wall paint.
Three different exposure levels (low, medium, and high) were created by shielding and placebo curtains which could be installed or removed by technicians during the 5-min breaks between sessions such that double-blinded conditions prevailed.
Participants were randomly subjected to one of three different exposure scenarios with five 50-min exposuresessions of which only the first four were relevant for the study of psychologicalsymptoms. The scenarios were HM: LHLML, MH: LMLHL, and LL: LLLLH. Due to early termination of the study, numbers of subjects for the three scenarios were not equal as projected (22 for HM, 26 for MH, and 9 for LL).
Mr. Daniell Porsche, Chairman of the Paracelsus-School at St. Jakob am Thurn, Salzburg, Austria
Hardell L et al.
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