Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Lancet is a peer-reviewed general medical journal, published weekly. It is one of the world''s best-known, oldest, and most respected general medical journals. With editorial offices in London and New York, The Lancet was founded in 1823 by Thomas Wakley, who named it after the surgical instrument called a lancet, as well as an arched window ("to let in light"). Since 1991 The Lancet is owned by Elsevier, a part of Reed Elsevier. As of 2008[update], the editor-in-chief is Richard Horton.