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"Dec. 31 - Two Belgian surgeons have described a previously unidentified ligament inside the human knee, which they say appears to play a role in the recovery of patients with anterior cruciate ligament (ACL) tears, an injury common among athletes...."^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2013/12/31/knee-ligament-discovery-could-bring-new?videoId=276268678>