ECHO: context and limitations Published February 15, 2020 Share Cite this study Get citation Jewell BL, Smith JA, Padian NS, van de Wijgert JHHM, Gollub EL, Jones HE, Ralph LJ, Hallet TB. ECHO: context and limitations. The Lancet. February 2020; 395(10222):E25-26. Co-Authors Lauren Ralph, PhD, MPH
