The utility of repeated postoperative radiographs after lumbar instrumented fusion for degenerative lumbar spine. - Yamashita T; Steinmetz MP; Lieberman IH; Modic MT; Mroz TE; Yamashita, Takayuki; Steinmetz, Michael P; Lieberman, Isador H; Modic, Michael T; Mroz, Thomas E (Spine (03622436), 2011)