Flash glucose monitoring
After randomisation, participants received three FreeStyle Libre 2 sensors (Abbott, Chicago, IL, USA), allowing the quantification of mean glucose, glucose CV (%) and percentage of time spent with interstitial glucose levels below 3.9 mmol/l (<70 mg/dl, time below range), within 3.9 and 10 mmol/l (70 to 180 mg/dl, time in range), above 10 mmol/l (>180 mg/dl, time above range) and above 7.8 mmol/l (>140 mg/dl) or 6.7 mmol/l (>120 mg/dl).