Each of them are proponents of the Electromagnetic hypersensitivity theory. EHS has no scientific basis. It's either imaginary illness or not related to EM radiation.

Prof. Osmo Hänninen has solid science background. After his retirement he has become a pseudo science crackpot. He supervised Dowsing PhD thesis in University of Oulu called "SPONTANEOUS MOVEMENTS OF HANDS IN GRADIENTS OF WEAK VHF ELECTROMAGNETIC FIELDS". It caused a scandal and the PhD thesis was rejected as pseudoscience. http://jultika.oulu.fi/files/isbn9789514297601.pdf