A system for treating patients includes a first magnetic device including a set of four magnetic discs arranged in a square array, the four magnetic discs including two having negative magnetic poles lying in a first plane and two having positive magnetic poles lying in the first plane, wherein the two magnetic discs having negative magnetic poles extend along a first diagonal line and the two magnetic discs having positive magnetic poles extend along a second diagonal line that crosses the first diagonal line, and a housing containing the four magnetic discs for maintaining the magnetic discs in the square array arrangement, the housing including an alignment marker for aligning the first magnetic device on a patient.