Frankie grew up to be 5ft 5 inches. the health problems may have caused the lack of height and eventually the symptoms of concussion type disorders. It may have been a genetic problem. He is lucky to be alive and have a girl friend. I fear for his future. If it is genetic, he may have a short life expectancy.
Well he might not be the tallest person in the world, but there are plenty of men his height and shorter with no stature related problems out there.