title: Accelerometer-based goniometer for smartphone and manual measurement on photographs: do they agree?
authors.forename: Giorgio
authors.initials: G
authors.lastname: Ferriero
authors.forename: Stefano
authors.initials: S
authors.lastname: Vercelli
authors.forename: Francesco
authors.initials: F
authors.lastname: Sartorio
authors.forename: Calogero
authors.initials: C
authors.lastname: Foti
mesh_terms: D061725:Accelerometry / Q000295:instrumentation* / Q000379:methods*; D056044:Actigraphy / Q000295:instrumentation / Q000379:methods; D040421:Cell Phone / Q000295:instrumentation*; D004551:Elbow Joint / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D018670:Monitoring, Ambulatory / Q000295:instrumentation / Q000379:methods; D010781:Photography / Q000379:methods*; D016059:Range of Motion, Articular / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity