Sometimes, after an intense bout with the nebulizing machine, his hand shook so much that he could not even write his name.

NPR: In 'Challenger Park,' Mom Is an Astronaut

Another round of the pitiless nebulizing machine, another night of waking Davis up every four hours so that the hose attached to the shoebox-sized device could deliver the misty medication that would restore his breath but rattle his fragile body.

NPR: In 'Challenger Park,' Mom Is an Astronaut