Table 3.

Appraisal of studies by study design using CASP tools

Key:
Article Number	Quantitative Studies	Qualitative Studies
1	Duffy et al., 2009	7. Tada et al., 2011
2	Walker et al., 2012	8. Machin et al., 2012
3	Hatzistilli et al., 2014	9. Salvaterra et al., 2010
4	Roh et al., 2014
5	Mohammed & El Sayed, 2015
6	Mustafa & Youness, 2015