Nanosecond pulsed electric fields cause melanomas to self-destruct... A NEW FORGOTTEN THERAPY?

In a study published in Biochem. Biophys. Res. Commun. it has been described a new non-drug therapy for melanoma. Pulsed electric fields greater than 20 kV/cm with rise times of 30 ns and durations of 300 ns penetrate into the interior of tumor cells and cause tumor cell nuclei to rapidly shrink and tumor blood flow to stop. Melanomas shrink by 90% within two weeks following a cumulative field exposure time of 120 μs. A second treatment at this time can result in complete remission. Apparently this 2006 discovery has not been used in clinical application and probably not due to the ineffectiveness of the method ... Probably one of the reasons is that the technique has not yet been duly tested 12 years later but, it’s right to say that the long-term testing has never been performed for many drug therapies, such as aspirin or even the so used chemiotherapy or others that are used anyway. Maybe this kind of melanoma drug-free therapy, would worthwhile to be seriously considered in the medical field. Is it unthinkable that this therapy went into oblivion precisely because it does not involve the use of drugs and therefore doesn't make any profit?