Effect of Work-Hour Regulations on Outcomes

  1. Leora Horwitz, MD, MHS;
  2. Harlan Krumholz, MD, SM;
  3. Zhenqui Lin, PhD; and
  4. Mikhail Kosiborod, MD
  1. From Yale School of Medicine, New Haven, CT 06510; Yale-New Haven Hospital, New Haven, CT 06504; and Mid America Heart Institute, Kansas City, MO 64111.

    IN RESPONSE:

    We appreciate Dr. Rifkin's firsthand experience and reactions to our study. Because this was a retrospective, observational study, we could not draw any firm conclusions about causality. Nonetheless, we fully agree with Dr. Rifkin that several factors, including increased …

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