Dapagliflozin across the range of ejection fraction in patients with heart failure: a patient-level, pooled meta-analysis of DAPA-HF and DELIVER.review of a recent study: Dapagliflozin across the range of ejection fraction in patients with heart failure: a patient-level, pooled meta-analysis of DAPA-HF and DELIVER. These trials were both placebo-controlled, randomised trials and independent commentary for the review has been provided by Professor Andrew Sindone, Director of the Heart Failure Unit and Department of Cardiac Rehabilitation at Concord Hospital.