Surgeons fit a nerve stimulator into the man's chest to reverse 15 years of unresponsive wakefulness.
But a World Rugby spokesman says there is no new evidence to challenge the current position.
A 45-year-old woman was affected by a condition called fat embolism syndrome after the procedure.
Acid attacks are on the rise. BBC Stories meets four survivors who have suffered as a result of this growing trend.
Alison Morton, 25, says she has learned to cope with fibromyalgia
Why used sanitary pads are being collected in India
Poppy Nash weaves her blood sugar results into fabric designs
The refugee doctors dealing with Glasgow's dialect
Depression doesn't have a specific appearance
The legal fight over a little boy became an international issue - and everyone had an opinion.