Group data–between-subject variation (mean concentrations, 95% confidence limits) of intact proinsulin (upper panel), insulin (middle panel) and the proinsulin:insulin ratio (lower panel) at collection (0h) and at the five time points thereafter, in samples kept at 4°C (left-hand panels) and at room temperature (right-hand panels) for the duration.

<p>Group data–between-subject variation (mean concentrations, 95% confidence limits) of intact proinsulin (upper panel), insulin (middle panel) and the proinsulin:insulin ratio (lower panel) at collection (0h) and at the five time points thereafter, in samples kept at 4°C (left-hand panels) and at room temperature (right-hand panels) for the duration.</p