Journal Article REPRODUCIBILITY AND VALIDITY OF A SEMIQUANTITATIVE FOOD FREQUENCY QUESTIONNAIRE Get access WALTER C. WILLETT, WALTER C. WILLETT 1The Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women's HospitalBoston, MA2Departments of Epidemiology and Nutrition, Harvard School of Public HealthBoston, MA Reprint requests to Dr. Walter C. Willett, Chan-ning Laboratory, 180 Longwood Avenue, Boston, MA 02115 Search for other works by this author on: Oxford Academic PubMed Google Scholar LAURA SAMPSON, LAURA SAMPSON 1The Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women's HospitalBoston, MA Search for other works by this author on: Oxford Academic PubMed Google Scholar MEIR J. STAMPFER, MEIR J. STAMPFER 1The Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women's HospitalBoston, MA2Departments of Epidemiology and Nutrition, Harvard School of Public HealthBoston, MA Search for other works by this author on: Oxford Academic PubMed Google Scholar BERNARD ROSNER, BERNARD ROSNER 1The Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women's HospitalBoston, MA Search for other works by this author on: Oxford Academic PubMed Google Scholar CHRISTOPHER BAIN, CHRISTOPHER BAIN 3Department of Social and Preventive Medicine, University of QueenslandAustralia Search for other works by this author on: Oxford Academic PubMed Google Scholar JELIA WITSCHI, JELIA WITSCHI 2Departments of Epidemiology and Nutrition, Harvard School of Public HealthBoston, MA Search for other works by this author on: Oxford Academic PubMed Google Scholar CHARLES H. HENNEKENS, CHARLES H. HENNEKENS 1The Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women's HospitalBoston, MA Search for other works by this author on: Oxford Academic PubMed Google Scholar FRANK E. SPEIZER FRANK E. SPEIZER 1The Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women's HospitalBoston, MA Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, Volume 122, Issue 1, July 1985, Pages 51–65, https://doi.org/10.1093/oxfordjournals.aje.a114086 Published: 01 July 1985 Article history Received: 18 July 1984 Revision received: 13 November 1984 Published: 01 July 1985