Internal electrode layers are superimposed in a dielectric substrate 1 at intervals. A media access control layer running on a radio processor of the communications stack at least partially processes messages received from a network, i. The waveguide is adjacent the source, receives electromagnetic radiation from the source, and delivers the electromagnetic radiation to the biological tissue. This invention also provides a pharmaceutical composition comprising laquinimod and DMF for use in treating a subject afflicted with multiple sclerosis or presenting a clinically isolated syndrome.