1 Department of Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland; International Graduate Academy, Institute of Health and Nursing Science, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany; Department of Health, Institute of Nursing Science, Eastern Switzerland University of Applied Sciences, St.Gallen, Switzerland.
2 University Medical Library, University of Basel, Basel, Switzerland.
3 Department of Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland; Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada.
4 Department of Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland; MTA-PTE Lendület "Momentum" Evidence in Medicine Research Group, Medical School, University of Pécs, Pécs, Hungary. Electronic address: s.schandelmaier@gmail.com.