25Benet and Hazard of Electromagnetic Fields
a biochemical point of view, it is important to have actually not only the same source of chemicals
but the same production batch (even chemicals from the most respected suppliers). On the other
hand, magnetic/electromagnetic conditions in different laboratories vary, and in most cases, the
background EMFs are not measured and described in publications.
Colbert et al. (2007) performed an analysis of 56 double-blind clinical studies to nd that only
two accurately reported all 10 of the selected parameters for analysis. One should not be surprised
that the same therapeutic device is reported to cause different effects in different clinical settings.
The questions are as follows: “Are these devices ...