UK Anti-Doping (UKAD) said it was "deeply concerned and shocked" by a Sunday Times report in which a British doctor alleged he had prescribed banned performance-enhancing drugs to 150 sportsmen including several Premier League footballers.
Reaction to WADA's decision to reinstate RUSADA
'It was probably one of the most difficult decisions to take in my career so far. But I thought that it was time for me to take on a fresh and new challenge'
Here are some reactions from the world of sport on of widespread state-sponsored doping by Russian athletes at the 2014 Sochi Olympics.