Peter C. Gøtzsche, MD is a Danish medical researcher, and leader of the Nordic Cochrane Center at Rigshospitalet in Copenhagen, Denmark. He has written numerous reviews within the Cochrane collaboration. Dr.Gøtzsche has been critical of screening for breast cancer using mammography, arguing that it cannot be justified; His critique stems from a meta-analysis he did on mammography screening studies and published as Is screening for breast cancer with mammography justifiable? in The Lancet in 2000. In it he discarded 6 out of 8 studies arguing their randomization was inadequate.