http://europepmc.org/abstract/MED/26873401
http://europepmc.org/abstract/MED/15305417
http://europepmc.org/abstract/MED/25151357
http://europepmc.org/abstract/MED/9138659
http://europepmc.org/abstract/MED/11388392
http://europepmc.org/abstract/MED/10753186
http://europepmc.org/abstract/MED/22877736
http://europepmc.org/abstract/MED/10223186
http://europepmc.org/abstract/MED/14641293
http://europepmc.org/abstract/MED/28548104
http://europepmc.org/abstract/MED/27107065
http://europepmc.org/abstract/MED/26759717
http://europepmc.org/abstract/MED/11857392
http://europepmc.org/abstract/MED/8044781
http://europepmc.org/abstract/MED/2263646
http://europepmc.org/abstract/MED/11185887
http://europepmc.org/abstract/MED/8697989
http://europepmc.org/abstract/MED/8242631
http://europepmc.org/abstract/MED/12807758
http://europepmc.org/abstract/MED/8467510
http://europepmc.org/abstract/MED/11297255
http://europepmc.org/abstract/MED/15761872
http://europepmc.org/abstract/MED/25839328
http://europepmc.org/abstract/MED/10709097
http://europepmc.org/abstract/MED/24686850
http://europepmc.org/abstract/MED/11306496
http://europepmc.org/abstract/MED/26462025
http://europepmc.org/abstract/MED/11004672
http://europepmc.org/abstract/MED/17573896
http://europepmc.org/abstract/MED/8028358
http://europepmc.org/abstract/MED/11704866
http://europepmc.org/abstract/MED/11960918
http://europepmc.org/abstract/MED/22607702
http://europepmc.org/abstract/MED/27749841
http://europepmc.org/abstract/MED/28481359
http://europepmc.org/abstract/MED/8280379
http://europepmc.org/abstract/MED/1855226
http://europepmc.org/abstract/MED/11309337
http://europepmc.org/abstract/MED/11531258