The items are: Clinical Frailty Scale (CFS) score12; Instrumental Activities of Daily Living (IADL) 13; Self-Rated Health Questionnaire (SRH-Q)14; Fall Risk Assessment (Falls-test); Grip Strength (Dynamometry)15; Timed Up and Go test (TUGT)16; and Laboratory Tests such as serum albumin17 and C-reactive protein (CRP).18 Here, CRP is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.