Formula 1 legend Michael Schumacher's doctor previously spoke about the German's 'stem cell treatment'.
Back in December 2013, seven-time world champion Schumacher was airlifted to the hospital after suffering a serious accident while skiing.
After being taken to the hospital, the German was placed in a medically induced coma until June 2014.
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Since then, very few to zero updates have been given after his family decided to keep the details private.
In 2019, it was claimed by multiple reports that Schumacher had undergone experimental stem cell therapy.
However, cardiac surgeon Professor Philippe Menasche, who was caring for Schumacher, played down expectations.
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As reported by Sky News, Menasche said: "With stem cells, I don't work miracles."
He also stated that he did not 'experiment' with any of the treatments.
The surgeon added: "With my team, we are not doing any experiments.
"It's an abominable term that does not correspond with my vision of what medicine is."
What is stem cell treatment?
Stem cell therapy uses uses the body's natural healing mechanisms to repair damaged or diseased tissues.
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Stem cells can be injected into damaged tissues to encourage repair and regeneration.
In Schumacher's case, it was claimed that his procedure 'is a pioneer in stem cell surgery against heart failure'.
According to Le Parisien, via the Daily Mail, Schumacher 'will have injections of secretome – dubbed ‘stem cell juice’.'
It was also claimed that the 'transfusions would prove an anti-inflammatory effect that could reach Schumacher’s brain'.
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What has Michael Schumacher's family said about his condition?
During a Netflix documentary about the F1 legend, Schumacher's wife, Corinna, explained: "Michael is here. Different, but he's here, and that gives us strength, I find. We live together at home. We do therapy. We do everything we can to make Michael better and to make sure he's comfortable, and to simply make him feel our family, our bond. And no matter what, I will do everything I can. We all will.
"We're trying to carry on as a family, the way Michael liked it and still does. And we are getting on with our lives. 'Private is private', as he always said. It's very important to me that he can continue to enjoy his private life as much as possible. Michael always protected us and now we are protecting Michael."
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Meanwhile, Schumacher's son, Mick, said: "I think dad and me, we would understand each other now in a different way now. Simply because we speak a similar language, the language of motorsport. And that we would have so much more to talk about.
"That's where my head is most of the time. Thinking that how cool that would be. I would give up everything just for that."
Topics: Michael Schumacher, Formula 1
Marcus Chan