http://europepmc.org/abstract/MED/1338904
http://europepmc.org/abstract/MED/24172857
http://europepmc.org/abstract/MED/22327622
http://europepmc.org/abstract/MED/10737795
http://europepmc.org/abstract/MED/25545608
http://europepmc.org/abstract/MED/10854222
http://europepmc.org/abstract/MED/24861525
http://europepmc.org/abstract/MED/23301059
http://europepmc.org/abstract/MED/17454753
http://europepmc.org/abstract/MED/8187091
http://europepmc.org/abstract/MED/17653897
http://europepmc.org/abstract/MED/14695993
http://europepmc.org/abstract/MED/1355210
http://europepmc.org/abstract/MED/19307944
http://europepmc.org/abstract/MED/21892161
http://europepmc.org/abstract/MED/28002797
http://europepmc.org/abstract/MED/11127266
http://europepmc.org/abstract/MED/1651563
http://europepmc.org/abstract/MED/17257127
http://europepmc.org/abstract/MED/24518971
http://europepmc.org/abstract/MED/24599305
http://europepmc.org/abstract/MED/28073006
http://europepmc.org/abstract/MED/12408524
http://europepmc.org/abstract/MED/24951259
http://europepmc.org/abstract/MED/25250560
http://europepmc.org/abstract/MED/9020916
http://europepmc.org/abstract/MED/26900293
http://europepmc.org/abstract/MED/20102718
http://europepmc.org/abstract/MED/29029407
http://europepmc.org/abstract/MED/21807601
http://europepmc.org/abstract/MED/27121310
http://europepmc.org/abstract/MED/30200630
http://europepmc.org/abstract/MED/11668620
http://europepmc.org/abstract/MED/28548125
http://europepmc.org/abstract/MED/20544848
http://europepmc.org/abstract/MED/23700467
http://europepmc.org/abstract/MED/26488212
http://europepmc.org/abstract/MED/12374230
http://europepmc.org/abstract/MED/21380628
http://europepmc.org/abstract/MED/10638959
http://europepmc.org/abstract/MED/21531819
http://europepmc.org/abstract/MED/23085758
http://europepmc.org/abstract/MED/25066378
http://europepmc.org/abstract/MED/26434631
http://europepmc.org/abstract/MED/27149842
http://europepmc.org/abstract/MED/17704924
http://europepmc.org/abstract/MED/22864938
http://europepmc.org/abstract/MED/18369740
http://europepmc.org/abstract/MED/24755471
http://europepmc.org/abstract/MED/11819789
http://europepmc.org/abstract/MED/18992635
http://europepmc.org/abstract/MED/15251969
http://europepmc.org/abstract/MED/17908962
http://europepmc.org/abstract/MED/21531761
http://europepmc.org/abstract/MED/28183795
http://europepmc.org/abstract/MED/28481359
http://europepmc.org/abstract/MED/29420467
http://europepmc.org/abstract/MED/1528264
http://europepmc.org/abstract/MED/8055154
http://europepmc.org/abstract/MED/20696052
http://europepmc.org/abstract/MED/19047896