Lengthening of dual growing rods and the law of diminishing returns.
Sankar WN, Skaggs DL, Yazici M, Johnston CE, Shah SA, Javidan P, Kadakia RV, Day TF, Akbarnia BA. Lengthening of dual growing rods and the law of diminishing returns. Spine (Phila Pa 1976). 2011 May 01; 36(10):806-9.