PERIOD–TIMELESS Interval Timer May Require an Additional Feedback Loop

• Robert S Kuczenski,

  Affiliation School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America

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• Kevin C Hong,

  Affiliation Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Terrassa, Spain

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• Jordi García-Ojalvo,

  Affiliation School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America

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• Kelvin H Lee

  *To whom correspondence should be addressed. E-mail: KHL9@cornell.edu

  Affiliation School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America

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