Use of Guideline-Recommended Heart Failure Drugs in High-, Middle-, and Low-Income Countries: A Systematic Review and Meta-Analysis oleh Gautam Satheesh, Rupasvi Dhurjati, Laura Alston, Fisaha Tesfay, Rashmi Pant, Ehete Bahiru, Claudia Bambs, Anubha Agarwal, Sanne A. E. Peters, Abdul Salam, Isabelle Johansson