1 Biophysics Group, Department of Physics and Astronomy, University College London Gower Street London UK ntk.thanh@ucl.ac.uk http://www.ntk-thanh.co.uk.
2 UCL Healthcare Biomagnetics and Nanomaterials Laboratories 21 Albemarle Street London UK.
3 UCL Electronic and Electrical Engineering, UCL Gower Street London UK.
4 Healthy Infrastructure Research Group, Department of Civil, Environmental & Geomatic Engineering, UCL Gower Street London UK.
5 Department of Physics, Aristotle University of Thessaloniki 54124 Thessaloniki Greece.
6 Environmental Research Laboratory, ClinicalMicrobiology and Virology, University College London Hospitals NHS Foundation Trust London UK.
7 Faculty of Dentistry, University of Toronto Toronto Ontario Canada.