Azvudine efficacy in reducing mortality in COVID-19 patients.

Background: Several therapeutic drugs have been authorized for the treatment of patients with Coronavirus disease 2019 (COVID-19). However, further research on the mechanisms of action, efficacy, and target populations of these novel therapeutic drugs are necessary. This study included mild, moderate, severe, and critical COVID-19 patients to evaluate azvudine's effectiveness across different severity levels.

[A meta-analysis on the efficacy of stem cells transplantation therapy on the prevention of cardiac remodeling and main adverse cardiovascular event in patients with chronic heart failure].

Objective: Stem cells transplantation is a promising strategy in cardiology. This meta-analysis summarizes the efficacy and safety of stem cells transplantation on top of standard medication on chronic heart failure patients.

Methods: The following databases were searched, including Cochrane Library (Issue 4, 2011), PubMed (1980 to 2011), Embase (1990 to 2011), CBM (1978 to 2011), CNKI (1994 to 2011), VIP (1989 to 2011), and WanFang Data (1998 to 2011).