Results of this study found that 10 hours per day of electromagnetic stimulation (1.0-1.5 mV) produced complete union in 23 of 26 patients receiving the treatment for nonjoined fractures.

A.F. Lynch & P. MacAuley, “Treatment of Bone Non-Union Electromagnetic Therapy,” Ir Journal of Med Sci, 154(4), 1985, . 153-155.