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        <title>Mustang Bio, Inc. Quarterly report pursuant to Section 13 or 15(d)</title>
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            <h3>Quarterly report pursuant to Section 13 or 15(d)</h3>
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                                <a class="menu-item " href="/sec-filings/all-sec-filings/xbrl_doc_only/99">Cover</a>
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                                <a class="menu-item " href="/sec-filings/all-sec-filings/xbrl_doc_only/122">Notes Details</a>
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                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/122">Organization, Description of Business and Liquidity and Capital Resources (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/123">Significant Accounting Policies - Anti-dilutive securities (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/124">License, Clinical Trial and Sponsored Research Agreements - Licenses (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/125">License, Clinical Trial and Sponsored Research Agreements - Sponsored (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/126">Related Party Agreements (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/127">Property and Equipment (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/128">Property and Equipment - Additional Information (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/129">Accounts Payable and Accrued Expenses (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/130">Commitments and Contingencies (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/131">Commitments and Contingencies - Cash flows (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/132">Commitments and Contingencies - Maturities of operating leases (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/133">Commitments and Contingencies - Additional Information (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/134">Notes Payable (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/135">Notes Payable - Additional Information (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/136">Stockholders&#039; Equity (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/137">Stockholders&#039; Equity - Stock Awards - Options (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/138">Stockholders&#039; Equity - Option activity and Unrecognized expense (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/139">Stockholders&#039; Equity - Restricted stock and RSUs (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/140">Stockholders&#039; Equity - Stock-based compensation expense (Details)</a></li>
                                                                            <li><a href="/sec-filings/all-sec-filings/xbrl_doc_only/141">Stockholders&#039; Equity - Warrants (Details)</a></li>
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                <h4>Significant Accounting Policies</h4>
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