Harvard Catalyst Profiles

Contact, publication, and social network information about Harvard faculty and fellows.

Daniel Alexander Leffler, M.D.

Co-Author

This page shows the publications co-authored by Daniel Leffler and Joseph Feuerstein.
Connection Strength

5.726
  1. Feuerstein JD, Ketwaroo G, Tewani SK, Cheesman A, Trivella J, Raptopoulos V, Leffler DA. Localizing Acute Lower Gastrointestinal Hemorrhage: CT Angiography Versus Tagged RBC Scintigraphy. AJR Am J Roentgenol. 2016 Sep; 207(3):578-84.
    View in: PubMed
    Score: 0.740
  2. Feuerstein JD, Leffler DA. Acute gastrointestinal bleeding. Ann Intern Med. 2013 Dec 03; 159(11):793.
    View in: PubMed
    Score: 0.621
  3. Feuerstein JD, Leffler DA. Colonoscopy and polyp characteristics. Ann Intern Med. 2013 Jan 15; 158(2):141-2.
    View in: PubMed
    Score: 0.584
  4. Grossberg LB, Papamichael K, Leffler DA, Sawhney MS, Feuerstein JD. Patients over Age 75 Are at Increased Risk of Emergency Department Visit and Hospitalization Following Colonoscopy. Dig Dis Sci. 2020 Jul; 65(7):1964-1970.
    View in: PubMed
    Score: 0.235
  5. Fudman DI, Papamichael K, Roemi L, Rao V, Falchuk KR, Leffler DA, Feuerstein JD. Effect of Consent and Educational Adjuncts to Consent on Patient Perceptions About Colonoscopy. J Clin Gastroenterol. 2019 09; 53(8):e316-e321.
    View in: PubMed
    Score: 0.231
  6. Fudman DI, Roemi L, Leffler DA, Feuerstein JD. Letter to the Editor: High Rate of Incomplete Consent for Colonoscopy: Identifying an Area for Improvement in Gastrointestinal Endoscopy. Am J Med Qual. 2020 May/Jun; 35(3):283-284.
    View in: PubMed
    Score: 0.230
  7. Feuerstein JD, Papamichael K, Popejoy S, Nadelson A, Lewandowski JJ, Geissler K, Martinez-Vazquez M, Leffler DA, Ariyabuddhiphongs K, Thukral C, Cheifetz AS. Targeted Physician Education and Standardizing Documentation Improves Documented Reporting with Inflammatory Bowel Disease Quality Measures in a Large Academic and Private Practice. Dig Dis Sci. 2018 01; 63(1):36-45.
    View in: PubMed
    Score: 0.204
  8. Shields HM. How to Create an Unfunded Teaching Fellowship During the Gastroenterology Fellowship That Positively Impacts Subsequent Teaching Activities and Career Path. Gastroenterology. 2017 03; 152(4):689-692.
    View in: PubMed
    Score: 0.193
  9. Feuerstein JD, Castillo NE, Akbari M, Belkin E, Lewandowski JJ, Hurley CM, Lloyd S, Leffler DA, Cheifetz AS. Systematic Analysis and Critical Appraisal of the Quality of the Scientific Evidence and Conflicts of Interest in Practice Guidelines (2005-2013) for Barrett's Esophagus. Dig Dis Sci. 2016 10; 61(10):2812-2822.
    View in: PubMed
    Score: 0.185
  10. Feuerstein JD, Castillo NE, Siddique SS, Lewandowski JJ, Geissler K, Martinez-Vazquez M, Thukral C, Leffler DA, Cheifetz AS. Poor Documentation of Inflammatory Bowel Disease Quality Measures in Academic, Community, and Private Practice. Clin Gastroenterol Hepatol. 2016 Mar; 14(3):421-428.e2.
    View in: PubMed
    Score: 0.177
  11. Sengupta N, Tapper EB, Patwardhan VR, Ketwaroo GA, Thaker AM, Leffler DA, Feuerstein JD. High Glasgow Blatchford Score at admission is associated with recurrent bleeding after discharge for patients hospitalized with upper gastrointestinal bleeding. Endoscopy. 2016 Jan; 48(1):9-15.
    View in: PubMed
    Score: 0.175
  12. Sengupta N, Tapper EB, Patwardhan VR, Ketwaroo GA, Thaker AM, Leffler DA, Feuerstein JD. Risk Factors for Adverse Outcomes in Patients Hospitalized With Lower Gastrointestinal Bleeding. Mayo Clin Proc. 2015 Aug; 90(8):1021-9.
    View in: PubMed
    Score: 0.173
  13. Sengupta N, Feuerstein JD, Patwardhan VR, Tapper EB, Ketwaroo GA, Thaker AM, Leffler DA. Erratum: the risks of thromboembolism vs. recurrent gastrointestinal bleeding after interruption of systemic anticoagulation in hospitalized inpatients with gastrointestinal bleeding: a prospective study. Am J Gastroenterol. 2015 Mar; 110(3):480.
    View in: PubMed
    Score: 0.169
  14. Sengupta N, Feuerstein JD, Patwardhan VR, Tapper EB, Ketwaroo GA, Thaker AM, Leffler DA. The risks of thromboembolism vs. recurrent gastrointestinal bleeding after interruption of systemic anticoagulation in hospitalized inpatients with gastrointestinal bleeding: a prospective study. Am J Gastroenterol. 2015 Feb; 110(2):328-35.
    View in: PubMed
    Score: 0.167
  15. Feuerstein JD, Lewandowski JJ, Martinez-Vazquez M, Leffler DA, Cheifetz AS. Documented compliance with inflammatory bowel disease quality measures is poor. Dig Dis Sci. 2015 Feb; 60(2):339-44.
    View in: PubMed
    Score: 0.165
  16. Feuerstein JD, Leffler DA, Cheifetz AS. Colonoscopy is appropriately utilized in most cases following a fair bowel prep. Am J Gastroenterol. 2014 Aug; 109(8):1289.
    View in: PubMed
    Score: 0.162
  17. Feuerstein JD, Leffler DA, Cheifetz AS. In reply--Clinical practice guidelines: still miles to go... Mayo Clin Proc. 2014 Jun; 89(6):860-1.
    View in: PubMed
    Score: 0.161
  18. Feuerstein JD, Akbari M, Gifford AE, Hurley CM, Leffler DA, Sheth SG, Cheifetz AS. Systematic analysis underlying the quality of the scientific evidence and conflicts of interest in interventional medicine subspecialty guidelines. Mayo Clin Proc. 2014 Jan; 89(1):16-24.
    View in: PubMed
    Score: 0.156
  19. Feuerstein JD, Leffler DA, Sheth SG, Cheifetz AS. An appraisal of the current state of gastroenterology practice guidelines. Gastroenterology. 2013 Dec; 145(6):1175-8.
    View in: PubMed
    Score: 0.155
  20. Feuerstein JD, Gifford AE, Akbari M, Goldman J, Leffler DA, Sheth SG, Cheifetz AS. Systematic analysis underlying the quality of the scientific evidence and conflicts of interest in gastroenterology practice guidelines. Am J Gastroenterol. 2013 Nov; 108(11):1686-93.
    View in: PubMed
    Score: 0.154
  21. Feuerstein JD, Leffler DA, Cheifetz AS. Letter: international IBD practice guidelines -- authors' reply. Aliment Pharmacol Ther. 2013 Aug; 38(3):326-7.
    View in: PubMed
    Score: 0.152
  22. Feuerstein JD, Leffler DA, Cheifetz AS. Letter: inflammatory bowel disease guidelines and conflicts of interest--authors' reply. Aliment Pharmacol Ther. 2013 Aug; 38(4):445-6.
    View in: PubMed
    Score: 0.152
  23. Feuerstein JD, Akbari M, Gifford AE, Cullen G, Leffler DA, Sheth SG, Cheifetz AS. Systematic review: the quality of the scientific evidence and conflicts of interest in international inflammatory bowel disease practice guidelines. Aliment Pharmacol Ther. 2013 May; 37(10):937-46.
    View in: PubMed
    Score: 0.148
  24. Feuerstein JD, Leffler DA, Cheifetz AS. How physicians interpret research funding disclosures. N Engl J Med. 2012 12 13; 367(24):2358-9; author reply 2360.
    View in: PubMed
    Score: 0.145
  25. Kothari D, Feuerstein JD, Moss L, D'Souza J, Montanaro K, Leffler DA, Sheth SG. An open-access endoscopy screen correctly and safely identifies patients for conscious sedation. Gastroenterol Rep (Oxf). 2016 Nov; 4(4):281-286.
    View in: PubMed
    Score: 0.047
  26. Patwardhan VR, Feuerstein JD, Sengupta N, Lewandowski JJ, Tsao R, Kothari D, Anastopoulos HT, Doyle RB, Leffler DA, Sheth SG. Fellowship Colonoscopy Training and Preparedness for Independent Gastroenterology Practice. J Clin Gastroenterol. 2016 Jan; 50(1):45-51.
    View in: PubMed
    Score: 0.045
Connection Strength
The connection strength for co-authors is the sum of the scores for each of their shared publications.

Publication scores are based on many factors, including how long ago they were written and whether the person is a first or senior author.
Funded by the NIH National Center for Advancing Translational Sciences through its Clinical and Translational Science Awards Program, grant number UL1TR002541.