Correction statement

     The authors of Quantitative research on the vertical force homogeneity of Yizhichan manipulate published in No.4, 2012 of Journal of Medical Biomechanics should be LV Jie¹, FANG Lei², YAN Jun-tao³, FANG Min³, CAO Jing-feng⁴, MA Long-long¹, XU Shi-xiong¹（1 Department of Mechanics and Engineering Sciences, Fudan University, Shanghai 200433, China；2 School of Rehabilitation, Shanghai University of Chinese Traditional Medicine, Shanghai201203, China；3 Yueyang Hospital of Shanghai University of Chinese Traditional Medicine, Shanghai 200437, China；4 Periodicals Agency of Shanghai University, Shanghai 200444, China）. The fund project should supplement two items: 1. Traditional Chinese Medicine project of State Administration of Traditional Medicine of China (200707013); 2 National outstanding youth fund project (81025022).