Is tramadol associated to bleeding peptic ulcer? A nationwide case-control study in hospitalized Swedish patients

• Hans Järnbert-Pettersson ,

  Roles Conceptualization, Data curation, Formal analysis, Methodology, Writing – original draft, Writing – review & editing

  * E-mail: Hans.Pettersson@ki.se

  Affiliation Karolinska Institutet, Department of Clinical Science and Education at Södersjukhuset, Stockholm, Sweden

  http://orcid.org/0000-0002-7674-3711

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• Marine L. Andersson,

  Roles Conceptualization, Methodology, Writing – review & editing

  Affiliation Karolinska Institutet, Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska University Hospital Huddinge, Stockholm, Sweden

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• Katarina Bilén,

  Roles Conceptualization, Methodology, Writing – review & editing

  Affiliation Karolinska Institutet, Department of Clinical Science and Education at Södersjukhuset, Stockholm, Sweden

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• Olle Broström,

  Roles Conceptualization, Methodology, Writing – review & editing

  Affiliation Karolinska Institutet, Department of Clinical Science and Education at Södersjukhuset, Stockholm, Sweden

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• Jonatan D. Lindh,

  Roles Conceptualization, Methodology, Writing – review & editing

  Affiliation Karolinska Institutet, Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska University Hospital Huddinge, Stockholm, Sweden

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• Buster Mannheimer

  Roles Conceptualization, Data curation, Formal analysis, Methodology, Writing – original draft, Writing – review & editing

  Affiliation Karolinska Institutet, Department of Clinical Science and Education at Södersjukhuset, Stockholm, Sweden

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