2.4 Screening process
The screening process was conducted by two authors independently. After
the studies were identified from search strategy, the studies were
transferred into EndnoteTM to check for duplication
and the studies were removed accordingly. The initial screening was
conducted first on study title and abstract. In the second level
screening, these articles were then checked within the full text to make
sure of their relevancy and eligibility. Any disagreements among
reviewers were resolved by discussion and reflection. Finally, the
reference lists from the selected articles were reviewed to identify any
other relevant trials.