“…Fifteen studies were purely qualitative using a combination of interviews, focus groups, participant observation and documentary evidence [ 41 – 45 , 47 , 49 , 52 – 59 ] with only four studies adopting mixed method approaches [ 46 , 48 , 50 , 51 ]. The participants in the studies were patients, carers and healthy individuals from a variety of ages, genders, socioeconomic groups and ethnicities [ 42 , 44 , 45 , 47 , 48 , 50 – 59 ] or were health professionals such as nurses or family doctors [ 43 , 44 , 46 , 48 , 49 , 59 ]. Three studies had a mixture of other participants such as employees of large public and private companies, general practice staff and a range of individuals from local and national organisations affiliated with the implementation of a DHI [ 41 , 46 , 48 ].…”