http://europepmc.org/abstract/MED/24082052
http://europepmc.org/abstract/MED/24179102
http://europepmc.org/abstract/MED/26351028
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http://europepmc.org/abstract/MED/26252618
http://europepmc.org/abstract/MED/23416519
http://europepmc.org/abstract/MED/26066391
http://europepmc.org/abstract/MED/23913001
http://europepmc.org/abstract/MED/25624344
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