Rigid Cervical Collars after Posterior Cervical Fusion: Do They Improve Outcomes? A Randomized Clinical Trial. - Havazyari, Aylar; Kamroo, Amirhossein; Bagherzadeh, Sadegh; Ranji, Mohammadtaha; Roohollahi, Faramarz; Paeenmahali, Abolfazl; Faghih-Jouibari, Morteza; Shafizadeh, Milad; Rubio, Diego Soto; Saleh, Dana; Greenberg, Mark; Alikhani, Puya; et al. (Asian Journal of Neurosurgery, 2026)