Comment to: Spray-applied cell therapy with human allogeneic fibroblasts and keratinocytes for the treatment of chronic venous leg ulcers: a phase 2, multicentre, double-blind, randomized, placebo-controlled trial, Kirsner RS et al. Lancet 2012;380:977-8. Veins & Lymphatics. 2013;2(1):8. doi:10.4081/ByblioLab.2013.8