Gerard Michel
Analyst · ROTH Capital
Thank you, everyone, for joining today. We have had a very productive 4 months since our last earnings call. I'd like to include the resubmission of the HEPZATO NDA on February 14 and the subsequent receipt of PDUFA date of August 14 from the FDA, the announcement of significant financing with high-quality investors and the continuation of a steady small publication for both commercial usage and clinical investigation of CHEMOSAT in Europe.
On February 14, we filed the NDA resubmission for HEPZATO. And on March 20, the FDA determined the resubmission constituted a complete Class 2 response and set up PDUFA date of August 14. We look forward to working with the FDA through the review process of our resubmission. Since I know I will be asked, at this time, we do not know whether the application will be the subject of an ADCOM, but we will continue to prepare for 1 unless we receive notification otherwise. Obviously, receiving the FDA acceptance was a major milestone for the company, and it represents a culmination of many, many years of hard work by Delcath employees, our various partners, investigators and patients.
Today, we announced a private investment in public equity or pipe deal, with health care-focused institutional investors as well as existing investors that will provide up to $85 million in gross proceeds, including $25 million in upfront funding upon closing. The financing was led by Vivo Capital with participation from the Logos Capital, BVF Partners, Stonepine and Serrado Capital as well as existing investors, including Rosalind Advisors. We are grateful for the participation of our existing investors and are delighted to have the financial [ backing ] of an additional set of investors.
The new investors are well-known, long-term health care-focused funds who conducted an extended amount of due diligence on clinical, regulatory, commercial and other topics before deciding to invest in Delcath. Their support validates the clinical revelance of and the commercial opportunity for HEPZATO in metastatic ocular melanoma. We believe the aggregate funding will fully support the commercial logical HEPZATO if approved, and take us to profitability without having to raise additional capital.
The structure was designed to remove financing overhang, something that is often an issue in normal economic environments and it's greatly exacerbated in the current environment. There is always a trade-off between fully financing a business and dilution. I think it is important to note that we will manage our business prudently with an eye towards building a shareholder value through generating and growing cash flows.
Given our likely operating margins and the existed uptake of HEPZATO, we likely to generate positive cash flows it a relatively short period after launch. In addition to the press release on this financing -- through the details of financing, including the impact on common shares and warrants outstanding upon the conversion of preferred stock is outlined in our current investor presentation, which can be found on our website. Tony will also cover this in greater detail in his section of the call.
On February 16, we announced the Board of Directors voted to appoint John Sylvester as a new Chairman of the Board. Mr. Sylvester has served as director since July 2019 and has extensive experience in experience building interventional oncology businesses, including senior commercial roles at BTG and most recently serving as Chief Executive Officer of both Curium SPECT and international business units. Mr. Sylvester will replace Dr. Roger Stoll, who has served as Chairman since October 2015 and will continue to serve as an active member of the Board of Directors and on various committees.
We thank Roger for his many years of leadership in the company and are grateful for his continued service for the company. And we look forward to Mr. Sylvester's guidance as the company prepares for a possible HEPZATO launch in the U.S.
In the U.S., we currently have enrolled 3 expanded access program treatment sites or EAPs. In addition, we have 4 more sites reviewing their agreements and Mayo Jacksonville and Mayo Rochester are undergoing startup activities. We currently have 8 patients at 1 participating site, which has completed 20 cumulative treatments across the patients. While we have not aggressively pursued EAP sites or put in place patient referral networks, we are now in the process of hiring a contract MSL team to support our EAP efforts and start building those referral networks.
In February, a publication was presented, which updated safety and efficacy results from the Phase I portion of the CHOPIN trial. The updated published results for 7 patients with advanced uveal melanoma treated with CHEMOSAT and ipilimumab plus nivolumab showed a median progression-free survival of 29.1 months and a median follow-up time of 29.1 months. At the time of publications, all patients were still alive and 3 of 4 patients, who subsequently experienced progressive disease continued with treatment in the form of repeated melphalan PHP treatments delivered by CHEMOSAT.
The ongoing randomized Phase II portion of the CHOPIN trial comparing melphalan PHP alone with melphalan PHP plus ipi/nivo, which will include another 76 patients, 38 per arm, is approximately 50% or more enrolled. We equally await the publication of interim results potentially late this year from the Phase II portion of this study. This should provide critical information about the potential utility of CHEMOSAT or HEPZATO used in sequence with immune checkpoint inhibitors.
Finally, in December, the results of a single center study in the treatment of cholangiocarcinoma were published in the journal clinical and experimental metastasis. The study was a retrospective analysis of 17 patients, who underwent a total of 20 -- excuse me, 42 procedures in CHEMOSAT and melphalan between October 2014 and in September 2020 as the Hannover Medical School in Germany.
The game of the retrospective monocentric study was to analyze PHP with CHEMOSAT as a palliative treatment for unresectable liver cholangiocarcinoma. Based on the results of the study, the authors concluded that percutaneous PHP CHEMOSAT is an effective and safe treatment option for patients with advanced cholangiocarcinoma and has the potential to prolong life in patients with inoperable treatment refractory in liver metastases.
The authors highlighted the increasing importance of locoregional forms of therapy in the treatment of cholangiocarcinoma and that the new addition of the German S3 cancer guidelines, diagnostics and therapy of hepatocellular carcinoma and biliary carcinomas now includes PHP with melphalan for the treatment of both inoperable intrahepatic cholangiocarcinoma and extrahepatic cholangiocarcinoma liver metastases.
That completes my prepared remarks, and I look forward to taking questions after Tony reviews the financials. Tony?