Table 3.

Overview of intervention components per article.

Intervention components	Pierce (2014)	Röhricht (2015)	Manford (2014)	Batcup (2013)
Goals 52	26	11	12	3
Activities 52	27	4	12	4
Effects 49	16	2	13	18
Total
148 Quotations	70	17	37	26