Comparison of blood loss between tranexamic acid-soaked absorbable Gelfoam and topical retrograde injection via drainage catheter plus clamping in cervical laminoplasty surgery oleh Chong Chen, Yong-yu Ye, Yi-fan Chen, Xiao-xi Yang, Jin-qian Liang, Guo-yan Liang, Xiao-qing Zheng, Yun-bing Chang