Additional Relevant Details The FDA initiated the clinical hold after Regulus reported a second serious adverse event (SAE) of jaundice. The SAE occurred in a HCV patient with end-stage renal disease on dialysis enrolled in its on-going Phase I US study 117 days after receiving a single dose of RG-101.Timelines for Regulus' three on-going studies of RG-101 are not expected to be impacted as all patients have been enrolled and completed their dosing of RG-101 and will continue with protocol scheduled visits. Regulus remains on track to deliver follow-up results from these studies at upcoming relevant scientific meetings.