by Elizabeth Hofheinz, M.P.H., M.Ed. Anterior Cervical Discectomy and Fusion  How far can you stretch indications before they “break?” A team of researchers has delved into this and more in a new study, “Potential Selection Bias in Observational Studies Comparing Cervical Disc Arthroplasty to Anterior Cervical Discectomy and Fusion.” The work, which appears in the …