Guidance needed: where should randomized studies which do not assess a health outcome be registered?

Affiliations

• ¹ CLEAR Methods Center, Division of Clinical Epidemiology, Department of Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland. Electronic address: benjamin.speich@usb.ch.
• ² The BMJ, London, The United Kingdom; Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, The United Kingdom.
• ³ CLEAR Methods Center, Division of Clinical Epidemiology, Department of Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland; Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada.