Karel G. Moons is a professor affiliated with the UMC Utrecht, The Netherlands. His work focuses on diagnosis and prognosis research methodology including prediction model research. He has contributed significantly to developing systematic review methods and standards that guide evidence synthesis in prognosis and prediction modeling across all healthcare disciplines and settings. He co-leads the Cochrane Prognosis Methods Group. Richard D. Riley is a Professor of Biostatistics at the University of Birmingham, UK. He specializes in methods for meta-analysis and prognosis research,, including the development, evaluation and critical appraisal of clinical prediction models. He has co-led the Cochrane Prognosis Methods Group since its inception.