Fig 1.
PRISMA Flow diagram; selection of relevant studies via databases.
Fig 2.
The distribution of published year of articles.
Fig 3.
The distribution of published articles based on countries.
Fig 4.
The frequency of articles related to types of interventions.
Fig 5.
The frequency of articles related to measuring the outcome of interventions.
Table 1.
Evaluation of the most important factors based on the type of intervention.