Randomized controlled comparison of cross-sectional survey approaches to optimize follow-up completeness in clinical studies

• Regula S. von Allmen ,

  Contributed equally to this work with: Regula S. von Allmen, Christian Tinner

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: regula.vonallmen@kssg.ch

  Affiliations Clinics for Vascular Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland, Swiss Cardiovascular Centre, Department of Cardiovascular Surgery, University Hospital Bern and University of Bern, Bern, Switzerland

  http://orcid.org/0000-0003-0221-1656

  ⨯
• Christian Tinner ,

  Contributed equally to this work with: Regula S. von Allmen, Christian Tinner

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

  Affiliation Swiss Cardiovascular Centre, Department of Cardiovascular Surgery, University Hospital Bern and University of Bern, Bern, Switzerland

  http://orcid.org/0000-0003-2920-7518

  ⨯
• Jürg Schmidli,

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

  Affiliation Swiss Cardiovascular Centre, Department of Cardiovascular Surgery, University Hospital Bern and University of Bern, Bern, Switzerland

  ⨯
• Hendrik T. Tevaearai,

  Roles Conceptualization, Formal analysis, Methodology, Supervision, Writing – original draft

  Affiliation Swiss Cardiovascular Centre, Department of Cardiovascular Surgery, University Hospital Bern and University of Bern, Bern, Switzerland

  ⨯
• Florian Dick

  Roles Conceptualization, Formal analysis, Investigation, Methodology, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliations Clinics for Vascular Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland, Swiss Cardiovascular Centre, Department of Cardiovascular Surgery, University Hospital Bern and University of Bern, Bern, Switzerland

  ⨯