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. 2011 May 31;49(5):267–272. doi: 10.3340/jkns.2011.49.5.267

Fig. 1.

Fig. 1

A : The yellow arrows indicate that local autologous bones (2.5 cc per one level) are prepared. B : The yellow arrows indicate that 2.5 cc PolyBone® per one level are added on each side as a posterolateral fusion expander.