http://europepmc.org/abstract/MED/23826216
http://europepmc.org/abstract/MED/22588899
http://europepmc.org/abstract/MED/28915660
http://europepmc.org/abstract/MED/25012071
http://europepmc.org/abstract/MED/20847279
http://europepmc.org/abstract/MED/22772731
http://europepmc.org/abstract/MED/21913188
http://europepmc.org/abstract/MED/19340432
http://europepmc.org/abstract/MED/19915484
http://europepmc.org/abstract/MED/25427834
http://europepmc.org/abstract/MED/26919320
http://europepmc.org/abstract/MED/28451406
http://europepmc.org/abstract/MED/23595628
http://europepmc.org/abstract/MED/21955926
http://europepmc.org/abstract/MED/20514489
http://europepmc.org/abstract/MED/29615461
http://europepmc.org/abstract/MED/20431032
http://europepmc.org/abstract/MED/22113362
http://europepmc.org/abstract/MED/21710625
http://europepmc.org/abstract/MED/23307057
http://europepmc.org/abstract/MED/22821382
http://europepmc.org/abstract/MED/23370430
http://europepmc.org/abstract/MED/22281806
http://europepmc.org/abstract/MED/22844452
http://europepmc.org/abstract/MED/28218421
http://europepmc.org/abstract/MED/20077503
http://europepmc.org/abstract/MED/22360629
http://europepmc.org/abstract/MED/24705251
http://europepmc.org/abstract/MED/24077805
http://europepmc.org/abstract/MED/21099717
http://europepmc.org/abstract/MED/19765000
http://europepmc.org/abstract/MED/24311631
http://europepmc.org/abstract/MED/27441955
http://europepmc.org/abstract/MED/28679024
http://europepmc.org/abstract/MED/25257301
http://europepmc.org/abstract/MED/23840696
http://europepmc.org/abstract/MED/23764841
http://europepmc.org/abstract/MED/26617880
http://europepmc.org/abstract/MED/23417712
http://europepmc.org/abstract/MED/25471051
http://europepmc.org/abstract/MED/19435942
http://europepmc.org/abstract/MED/21088844
http://europepmc.org/abstract/MED/22015945
http://europepmc.org/abstract/MED/22772980
http://europepmc.org/abstract/MED/29026176
http://europepmc.org/abstract/MED/29683790
http://europepmc.org/abstract/MED/22821383
http://europepmc.org/abstract/MED/28663030
http://europepmc.org/abstract/MED/24714777
http://europepmc.org/abstract/MED/21569770
http://europepmc.org/abstract/MED/23204232
http://europepmc.org/abstract/MED/24149775
http://europepmc.org/abstract/MED/21251613
http://europepmc.org/abstract/MED/22426639
http://europepmc.org/abstract/MED/23486690
http://europepmc.org/abstract/MED/24160898
http://europepmc.org/abstract/MED/24004584
http://europepmc.org/abstract/MED/24140581
http://europepmc.org/abstract/MED/29600313
http://europepmc.org/abstract/MED/22904127
http://europepmc.org/abstract/MED/28481359
http://europepmc.org/abstract/MED/23990986
http://europepmc.org/abstract/MED/20131059
http://europepmc.org/abstract/MED/22688054
http://europepmc.org/abstract/MED/21107199
http://europepmc.org/abstract/MED/21760534
http://europepmc.org/abstract/MED/29031038
http://europepmc.org/abstract/MED/23451940