Supplemental material, sj-doc-1-mdm-10.1177_0272989X211024980 for Relationships among Antecedents, Processes, and Outcomes for Shared Decision Making: A Cross-Sectional Survey of Patients with Lumbar Degenerative Disease by Chia-Hsien Chen, Hsin-Yi Chuang, Yen Lee, Glyn Elwyn, Wen-Hsuan Hou and Ken N. Kuo in Medical Decision Making