The Editorial Board of Biomédica informs that due to conflicts among the authors, it has been forced to retract the paper “Effectiveness of low back pain treatment with acupuncture” signed by Montes LA, Valenzuela MJ (Biomédica. 2018;38(0):54-60. doi: 10.7705/biomedica.v38i0.3546). Any authorship dispute must be resolved by the authors before the manuscript is submitted.