“…In practice, a total of 11 were identified [5,28,30,32,34,38,39,[43][44][45][46], and seven [28,32,34,35,38,39,46] were included in at least one of the reviews. In six reviews the main controlled trials of our reference programmes [28, 30-32, 38, 44] were included in data synthesis [10,11,16,18,19,25]. Out of 25 [5, 33-37, 39, 41-43, 45-59] replication trials (phase 4, see text box: Phases of 'increasing evidence of complex interventions') four [34,35,39,46] were included in six reviews [16,19,21,22,24,25].…”