title: Comment on: A novel arthritis in vivo fluorescence optical imaging technology pushed to the limits: reply.
authors.forename: Valentin S
authors.initials: VS
authors.lastname: Schäfer
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Hartung
authors.forename: Boris
authors.initials: B
authors.lastname: Ehrenstein
authors.forename: Martin
authors.initials: M
authors.lastname: Fleck
mesh_terms: D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D006225:Hand / Q000473:pathology*; D006801:Humans; D008297:Male; D061848:Optical Imaging / Q000379:methods*