https://www.selleckchem.com/products/finerenone.html Background Among severely immunosuppressed patients resistant or refractory cytomegalovirus (CMV) retinitis is not uncommon, and is potentially blinding in the affected eye. Immunotherapy using CMV-specific cytotoxic T lymphocytes (CTLs) is an emerging and promising alternative for the control of resistant or refractory CMV retinitis. However, highly purified CMV-CTLs are still not available in the majority of medical institutions in China because the generation of CMV-CTLs is labor intensive, time-consuming and expensive.Purpose This letter describes the clinical responses to a simplified CMV-CTL immunotherapy aimed at controlling drug-resistant CMV retinitis in two immunodeficient patients.Conclusions Our cases suggest that the simplified CMV-CTL immunotherapy offers a highly efficient and low-cost solution to drug-resistant CMV retinitis. This immunotherapy strategy targeting drug-resistant CMV retinitis is likely to be cost-effective in the context of a specific patient population. To conduct a descriptive content analysis of normative documents on the role of research ethics committees (RECs) after the approval of clinical trial protocols. The question to be addressed is whether and to what extent normative documents support a monitoring role for RECs in the United States and the European Union. A qualitative content analysis of 19 normative documents on clinical research as outlined by the International Compilation of Human Research Standards 2020 edition and other related documents for the EU and USA. After the approval of research protocols, RECs' general role is to receive reports from researchers on the trials' progress. Additionally, RECs receive notifications of protocol amendments, deviations and, to a lesser extent, violations, which is the remit of the regulatory/competent authorities. RECs are expected to issue opinions on clinical trials' progress and give supplemental opinions/approval or withdra