Double Olympic champion Mo Farah is set to be investigated by UK Athletics as the fall-out from the doping allegations made against his coach continues.
Farah's coach Alberto Salazar, who also serves as an "unpaid consultant" for UK Athletics, and Galen Rupp - a silver medal winner behind Farah in the 10,000 metres at the 2012 Olympic Games in London - was accused of doping practices in a BBC Panorama documentary last week.
Despite vowing to stand behind his coach, Farah withdrew from Sunday's Diamond League event in Birmingham claiming he felt "emotionally and physically drained".
"What we can look at is all the data surrounding our own athlete, Mo Farah: blood data, supplements data – everything surrounding his medical treatment," UK Athletics chairman Ed Warner told BBC Radio 4
"We need to make sure there's nothing else there we haven't seen, we're not aware of, hasn't been analysed.
"It may well be that the outcome of our own investigation says there's nothing untoward going on as far as we can uncover in any way, shape or form around British Athletics and a British athlete.
"If, subsequently, the coach himself is proven to be guilty of doping offences, then there's a second stage there and a decision would need to be taken."
Asked about those who have called for Farah to distance himself from Salazar by BBC Radio 5 Live, Warned added: "I completely respect the fact Mo has great loyalty to his coach.
"And, as the British Athletics chairman, you absolutely can't make a kneejerk reaction like that because Salazar is innocent until proven guilty and we need to conduct our own thorough investigation of everything that's gone on with British Athletics and around Mo Farah in our engagement with Alberto.
"To say instantly you should sever your links would be a very unprofessional thing to do, but from a personal perspective I can see why some people might advise Mo to have done that because this is going to be dogging him reputationally for some time, if not the rest of his career. He's found himself in a no-win situation."