The effort comes amid growing concern about the risk of brain injuries in football, but the scope extends well beyond concussions to bone and joint injury, heart disease, depression and chronic pain that affect many players long after their careers are over.
So began the long process of rehabilitation, surgery, another stint of rehab and dealing with another injury, a bone bruise.
Davies, who won the first of his 57 Wales caps against Ukraine in 2001, has been sidelined since April after cracking a bone in a foot, an injury that required an operation.
Deng had to pull out of the Eurobasket tournament, where his British teammates are competing in Bulgaria between September 7-20, due to a stress fracture to a bone in his leg, an injury that kept him out of action for much of last season.
The research found thin people were less protected by body fat so had an increased risk of bone fractures, which could raise their injury rate.
"Recent scans confirm an injury to the right knee with bone bruising and possible cartilage damage to the kneecap, " the ECB said in a statement.
He hasn't played since, and the Knicks said his injury had progressed to a fractured bone at the outside of his left foot, otherwise known as a Jones fracture.
Even though he is available on a free transfer his time on Tyneside has been plagued by injury problems, including a broken metatarsal bone, knee ligament damage sustained at the 2006 World Cup, a double hernia operation and a thigh problem.
The injury is said to be separate from the bone spur problem he had last year.
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The researchers also demonstrated that severe injury is not necessary for the formation of mature liver cells from bone marrow cells.
From a logistical standpoint, a bone does not need to be protruding through the skin in order for the injury to be called a compound fracture.
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