It seems new research believes this is not to be case.
We've evidence of a person who was dwarf till age 19, and later growth up to 233cm (7'4)
I wonder how long it will take with modern genetic engineering where we can resume growth in people.
I bet you can raise hell lot of money of someone decides to work on this problem, there are so many short people, short billionaores, dictators in the world who would invest to become taller.
So is anyone working on it?