http://europepmc.org/abstract/MED/21325596 http://europepmc.org/abstract/MED/24523240 http://europepmc.org/abstract/MED/22237025 http://europepmc.org/abstract/MED/11921279 http://europepmc.org/abstract/MED/21339757 http://europepmc.org/abstract/MED/24923295 http://europepmc.org/abstract/MED/21989985 http://europepmc.org/abstract/MED/17485549 http://europepmc.org/abstract/MED/16627249 http://europepmc.org/abstract/MED/27288520 http://europepmc.org/abstract/MED/12393679 http://europepmc.org/abstract/MED/12874780 http://europepmc.org/abstract/MED/24497565 http://europepmc.org/abstract/MED/21399634 http://europepmc.org/abstract/MED/11023523 http://europepmc.org/abstract/MED/21294243 http://europepmc.org/abstract/MED/27881874 http://europepmc.org/abstract/MED/25381062 http://europepmc.org/abstract/MED/15180860 http://europepmc.org/abstract/MED/16230371 http://europepmc.org/abstract/MED/10068652 http://europepmc.org/abstract/MED/25652455 http://europepmc.org/abstract/MED/27063598 http://europepmc.org/abstract/MED/14615365 http://europepmc.org/abstract/MED/17550866 http://europepmc.org/abstract/MED/19773259 http://europepmc.org/abstract/MED/25066867 http://europepmc.org/abstract/MED/26438511 http://europepmc.org/abstract/MED/25412851 http://europepmc.org/abstract/MED/27359055 http://europepmc.org/abstract/MED/27276561 http://europepmc.org/abstract/MED/21343560