Henry Heimlich year of age, as does the National Safety Council. The 2005 choking-rescue guidelines published by the American Heart Association called the procedure "abdominal thrusts". The new guidelines stated that chest thrusts and back blows may also deal with choking effectively. In spring 2006, the American Red Cross "downgraded" the use of the Heimlich maneuver, essentially returning to the pre-1986 guidelines. For conscious victims, the new guidelines (nicknamed "the five and five"), recommend first applying five backblows; if this method fails to remove the airway obstruction, rescuers will then apply five abdominal thrusts. For unconscious victims, the new guidelines recommend chest
What Is Life? his 1922 article "Variation due to Change in the Individual Gene" already laid out all the basic properties of the "heredity molecule" (then not yet known to be DNA) that Schrödinger was to re-derive in 1944 "from first principles" in "What is Life?" (including the "aperiodicity" of the molecule), properties which Muller specified and refined additionally in his 1929 article "The Gene As The Basis of Life" and during the 1930s. Moreover, H. J. Muller himself wrote in a 1960 letter to a journalist regarding "What Is Life?" that whatever the book got right about the "hereditary molecule" had already