{{Cite journal| doi = 10.1016/j.jpainsymman.2015.05.015| issn = 1873-6513 (Electronic) 0885-3924 (Linking)| volume = 50| issue = 5| pages = 659–75 e3| last1 = van der Steen| first1 = J. T.| last2 = Sampson| first2 = E. L.| last3 = Van den Block| first3 = L.| last4 = Lord| first4 = K.| last5 = Vankova| first5 = H.| last6 = Pautex| first6 = S.| last7 = Vandervoort| first7 = A.| last8 = Radbruch| first8 = L.| last9 = Shvartzman| first9 = P.| last10 = Sacchi| first10 = V.| last11 = de Vet| first11 = H. C.| last12 = Van Den Noortgate| first12 = N. J.| last13 = Collaborators| first13 = Eu-Cost Action TD| title = Tools to Assess Pain or Lack of Comfort in Dementia: A Content Analysis| journal = J Pain Symptom Manage| date = 2015-07-28| pmid = 26212095}}