TORONTO – For Scott Kadwell, president of Markham, Ontario-based RSK Medical Inc., the distributor tagged to sell the Health Canada approved Gammacore Sapphire, the device represents “a shift from a business to business to a direct-to-consumer business model.” For Rockaway, N.J.’s Electrocore Inc. which developed the self-administered technology, it’s one more regulator to have greenlighted the FDA cleared, CE-marked device for treating intractable migraine and cluster headache.