Prevalence of left ventricular systolic dysfunction and heart failure with reduced ejection fraction in men and women with type 2 diabetes mellitus: a systematic review and meta-an... oleh Selma Bouthoorn, Aisha Gohar, Gideon Valstar, Hester M. den Ruijter, J. B. Reitsma, Arno W. Hoes, Frans H. Rutten, the Queen of Hearts Consortium