This is just a theory, but it makes sense... To me.
Those children were stolen by the demon, just like Anita was. They were brought here. The doctor examined them just like he did with Anita. But unlike Anita, all these children are perfectly healthy. They're not kept in horrid conditions, but rather a happy environment. For what, I'm not sure. Maybe they're sacrificed to the demon by the cloaked men. Or kept as pets.
Because Anita wasn't perfectly healthy, they, and God I hope this is what they did, they sent her back with her family.
And then I come into play. How? I haven't figured that one out yet. I'm not one of them. I'm much too old. I'm legally an adult.
I guess I have no choice but to sit and wait.