A PET [18F]altanserin study of 5-HT2A receptor binding in the human brain and responses to painful heat stimulation. - Ron Kupers; Vibe G. Frokjaer; Arne Naert; Rune Christensen; Esben Budtz-Joergensen; Henrik Kehlet; Gitte Moos Knudsen (NeuroImage, 2009)

Serotonin transporter binding in the hypothalamus correlates negatively with tonic heat pain ratings in healthy subjects: A [11C]DASB PET study. - Ron Kupers; Vibe G. Frokjaer; David Erritzoe; Arne Naert; Esben Budtz-Joergensen; Finn Årup Nielsen; Henrik Kehlet; Gitte Moos Knudsen (NeuroImage, 2011)