Authors: Elizabeth A McGlynn; Steven M Asch; John Adams; Joan Keesey; Jennifer Hicks; Alison DeCristofaro; Eve A Kerr Journal: N Engl J Med Date: 2003-06-26 Impact factor: 91.245
Authors: John D Birkmeyer; Therese A Stukel; Andrea E Siewers; Philip P Goodney; David E Wennberg; F Lee Lucas Journal: N Engl J Med Date: 2003-11-27 Impact factor: 91.245