Cystic Fibrosis / Quality of life / Humans / Female / Male / Nutritional Status / Health Status / Clinical Sciences / Questionnaires / Spirometry / Adult / Reproducibility of Results / Chronic obstructive pulmonary disease / Severity of Illness Index / Nutritional Status / Health Status / Clinical Sciences / Questionnaires / Spirometry / Adult / Reproducibility of Results / Chronic obstructive pulmonary disease / Severity of Illness Index