http://europepmc.org/abstract/MED/11801559 http://europepmc.org/abstract/MED/10896202 http://europepmc.org/abstract/MED/8009954 http://europepmc.org/abstract/MED/11051241 http://europepmc.org/abstract/MED/8674005 http://europepmc.org/abstract/MED/10427138 http://europepmc.org/abstract/MED/10029095 http://europepmc.org/abstract/MED/16818615 http://europepmc.org/abstract/MED/9115587 http://europepmc.org/abstract/MED/15450401 http://europepmc.org/abstract/MED/17146433 http://europepmc.org/abstract/MED/11557779 http://europepmc.org/abstract/MED/17917588 http://europepmc.org/abstract/MED/10416986 http://europepmc.org/abstract/MED/8548759 http://europepmc.org/abstract/MED/9546059 http://europepmc.org/abstract/MED/14581362 http://europepmc.org/abstract/MED/8180965 http://europepmc.org/abstract/MED/15494720 http://europepmc.org/abstract/MED/8397797 http://europepmc.org/abstract/MED/28481359 http://europepmc.org/abstract/MED/17721049 http://europepmc.org/abstract/MED/8666369