def self.source_info
        {
          base_url:           'https://www.tempus.com/clinical-validation-of-the-tempus-xt-next-generation-targeted-oncology-sequencing-assay/',
          site_url:           'https://www.tempus.com/',
          citation:           'Beaubier, N, Tell, R, Lau, D, Parsons, JR, Bush, S, Perera, J, Sorrells, S, Baker, T, Chang, A, Michuda, J, Iguartua, C, MacNeil, S, Shah, K, Ellis, P, Yeatts, K, Mahon, B, Taxter, T, Bontrager, M, Khan, A, Huether, R, Lefkofsky, E, & White, KP. Clinical validation of the tempus xT next-generation targeted oncology sequencing assay. Oncotarget 2019 Mar 22;10(24):2384-2396. PMID: 31040929.',