title: Reply to: accelerometer-based goniometer for smartphone and manual measurement on photographs: do they agree?
authors.forename: Igor
authors.initials: I
authors.lastname: Fischer
authors.forename: Sascha
authors.initials: S
authors.lastname: Gick
authors.forename: Hans-Jakob
authors.initials: HJ
authors.lastname: Steiger
mesh_terms: D061725:Accelerometry / Q000295:instrumentation* / Q000379:methods*; D040421:Cell Phone / Q000295:instrumentation*; D004551:Elbow Joint / Q000502:physiology*; D006801:Humans; D010781:Photography / Q000379:methods*; D016059:Range of Motion, Articular / Q000502:physiology*