Additional file 3: of Well informed physician-patient communication in consultations on back pain – study protocol of the cluster randomized GAP trial Sebastian Voigt-Radloff Andrea Schöpf Martin Boeker Luca Frank Erik Farin Klaus Kaier Mirjam Körner Katharina Wollmann Britta Lang Joerg Meerpohl Ralph Möhler Wilhelm Niebling Julia Serong Renate Lange Piet Keylen Andy Maun 10.6084/m9.figshare.7770161.v1 https://springernature.figshare.com/articles/journal_contribution/Additional_file_3_of_Well_informed_physician-patient_communication_in_consultations_on_back_pain_study_protocol_of_the_cluster_randomized_GAP_trial/7770161 Characteristics of survey instruments. (DOCX 30 kb) 2019-02-25 05:00:00 Lower back pain Health communication Internet portal Primary health care Evidence-based medicine