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the SAR-value was determined by power loss measurements and FDTD calculations; transmitted and reflected power was measured at CWexposure (915 MHz, 0.25 W), with and without sample tubes in the TEM-cell using a power meter and a coaxial directional coupler; because the absorbedpower in the 0.5-ml sample was too small to be measured, the measurements were performed using 5-ml samples instead; numerical calculations were performed using the FDTD method for CWexposure (912 MHz, 2 W); the routine was run for seven cycles to assure that the results have converged; average SAR was calculated through extrapolation to the pulsedGSMsignal with a duty factor of 0.125 and 2 W during the pulses The difference between the FDTD-derived value and the measured SAR should be explained by different coupling of the samples, 0.5 ml and 5 ml, to the field in the exposure system