I agree with this advice. The more you have yelling at him, the better.
and TELL YOUR KIDS, have them calling him yelling and bawling about it. He has shown himself to be impervious to reason, you have to go full bore with emotion now, that is the only chance. Is he going to divorce you over it? just keep thinking what is the worst case scenario— i think that would be death from lack of treatment, right?