http://europepmc.org/abstract/MED/27806318
http://europepmc.org/abstract/MED/26355235
http://europepmc.org/abstract/MED/26437033
http://europepmc.org/abstract/MED/25855048
http://europepmc.org/abstract/MED/25865354
http://europepmc.org/abstract/MED/26093648
http://europepmc.org/abstract/MED/28481359
http://europepmc.org/abstract/MED/29315289
http://europepmc.org/abstract/MED/26018969
http://europepmc.org/abstract/MED/26109290
http://europepmc.org/abstract/MED/27566247
http://europepmc.org/abstract/MED/26832993
http://europepmc.org/abstract/MED/26856273
http://europepmc.org/abstract/MED/25931199
http://europepmc.org/abstract/MED/25593300
http://europepmc.org/abstract/MED/27255162