Comparative outcomes of unilateral and bilateral cage placement in lumbar interbody fusion: a systematic review and meta-analysis of randomized controlled trials. - Stamiris, Stavros; Stamiris, Dimitrios; Anestiadou, Elissavet; Sarridimitriou, Athanasios; Cheva, Angeliki; Loukousia, Antonia; Vrangalas, Vasilleios; Christodoulou, Pavlos; Karampalis, Christos (Asian Spine Journal, 2026)