That is why I qualified my statement, though, since I'm sure some research has been done in the intervening years. If he didn't know the secret to making a vegan diet work for small children, I bet the parents didn't either, and that's one reason why the poor kids were so puny.
I will say that he was a crackerjack pediatrician, and he saved my little sister's life. I would pretty much still go with his opinion. He's retired from practice now, but I could always go ask him if he's changed his mind!
45 years ago,no one had knew what this condition was(other than just mentally retarded)much less how to treat it,so I guess I'll give him a pass:D