title: Reply to Martincorena et al.: Evidence for constrained positive selection of cancer mutations in normal skin is lacking.
authors.affiliation: The Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, United Kingdom; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom; Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 1QR, United Kingdom bds10@cam.ac.uk.
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Simons
mesh_terms: D002471:Cell Transformation, Neoplastic / Q000235:genetics*; D004817:Epidermis / Q000473:pathology*; D006801:Humans; D009369:Neoplasms / Q000235:genetics*; D013234:Stem Cells / Q000473:pathology*