Oh, height implants! They don't do it in the U.S., but I think they do it is Russia and China. They break the bones in your arms and legs, stretch them apart with braces, and the bone heals up longer.
Can I sleep through the healing process? It sounds incredibly painful.
It's done a lot in Japan. Some universities there have height requirements for students to be allowed in.
But, it is done now and then in the Netherlands too. Met a boy 25 years ago, who was really tiny, and he got the treatment. Wasn't too painful, apparently, and he was allowed to turn the elongating screws himself daily. It takes lots and lots of time though, in hospital. And, for balanced effect it has to be done in both the lower and upper leg.
Have not heard of this treatment in arms yet, but, it would be unlikely if that wasn't done by now.
Ah, I just see QV had something on arm elongations.