“…Witte's Promotor Theory was initially a two-centre theory of power, where two specialists cooperate; the expert promotor contributes through expert knowledge and the power promotor through hierarchical power (Witte, 1977;Rost et al, 2007;Fichter, 2009). Later, other promotor roles have been added (Rost et al, 2007;Fichter, 2009), for instance, a process promotor, a relationship promotor, and technological gatekeepers. Promotor theory stresses that it is not necessary for the different specialised promotor roles to be played by different individuals.…”