“…Twenty-eight were performed in Europe [ 20 , 32 – 36 , 38 , 40 , 41 , 43 – 45 , 50 , 52 , 53 , 55 – 57 , 59 , 63 , 64 , 66 , 69 , 73 , 76 – 78 ], 11 in North America [ 22 , 37 , 39 , 46 , 49 , 54 , 65 , 70 , 72 , 74 , 75 ], 11 in Asia [ 31 , 42 , 47 , 51 , 58 , 60 – 62 , 67 , 68 , 71 ] and one was a multi-country study [ 48 ]. The control populations were either healthy controls ( N = 14) [ 31 , 35 , 59 , 60 , 62 , 65 , 67 – 69 , 71 , 72 , 75 – 77 ] or were recruited at the same department as the patient population, but without DD or HFpEF ( N = 37) [ 32 – 34 , 36 – 42 , 58 , 61 , 63 , 64 , 66 , 70 ]. The mean age of the DD and HFpEF populations ranged from 51 to 74 years and...…”