“…The included studies were published between 1997 and 2021. All had a theoretical or methodological design: 6 were (or included) reviews of the literature 5,7,13,24,25,34 , 6 were theoretical studies or had a theoretical component, 6,12,22,26,27,35 2 proposed theoretical frameworks, 36,37 and 1 was a methodological guideline. 23 The arguments extracted from the included studies pertained to analytical frameworks (from 14 studies, equal to 93%), generic outcome measures (5 studies, 33%), techniques used to elicit utility values (3 studies, 20%), and disease-specific outcome measures and instruments to collect health states data (2 studies, 13%).…”