Drupal-Bibcite0<style face="normal" font="default" size="100%">Challenges in conducting clinical trials in nephrology: conclusions from a Kidney Disease-Improving Global Outcomes (KDIGO) Controversies Conference.</style><style face="normal" font="default" size="100%">Challenges in conducting clinical trials in nephrology: conclusions from a Kidney Disease-Improving Global Outcomes (KDIGO) Controversies Conference.</style>