“…As per our inclusion criteria, all cohort studies were based in Europe and included 23 studies from Spain (14, 16, 17, 22, 28, 29, 32, 33, 35, 50, 54, 57-59, 64, 67, 70, 80, 89, 92, 96, 97, 101), 22 studies from Italy(13, 19, 21, 23, 25, 30, 38, 39, 45, 47, 48, 55, 56, 61, 62, 68, 71, 77, 79, 90, 91, 93), 15 studies from France (20, 24, 27, 31, 40, 41, 43, 53, 60, 63, 65, 74, 76, 86, 99), ten studies from the UK (26, 34, 44, 49, 52, 66, 72, 75, 87, 98), four included patients from more than one country (69, 73, 88, 94), three from Germany (46, 51, 78), two studies from Sweden(36, 100), two from Denmark (42, 83) and one study from Belgium (81), Finland (5), the Netherlands (18), Norway (85) and Poland (37). The diagnosis of COVID-19 was made mainly with a PCR test, except for in five studies in which the diagnosis was made with the ICD Classification (20, 24, <...>…”