I don't have one here.
Only very recently needed help in this matter (Bristol Airport's long distance walks to the departure gates were the deciding factor).
Emphysema (years of previous smoking) plus huge weight gain (underactive thyroid, lack of exercise, eating too much) have made far worse a long term back injury (ruptured disc) to create the current need for a scooter.
So, essentially a self made condition.
From qualified squash coach and keen tennis player to this in a relatively short time.
....and sadly, I really enjoyed every blooming faggie and still sneak a crafty one.
Stupid or what?