The baseline bubble inclinometer measurement of sagittal thoracic spinal range of motion is reliable: Validated by optoelectronic motion capture system. - Jiang, Ziang; Ye, Jiling; Cheng, Rongshan; Zhang, Qiang; Xu, Lili; Tsai, Tsung-Yuan (Journal of Back & Musculoskeletal Rehabilitation, 2026)