Table 2.

Domains covered in each study

	Domain
Reference	1	2	3	4	5
Tao et al. 7	✓	✓	✓	✓	✓
Gou et al. 8	✓	✓	✓	✓
Wong et al. 9	✓	✓	✓	✓	✓
Ti et al. 10	✓	✓	✓	✓	✓
Wu et al. 11	✓		✓	✓	✓
Li et al. 12	✓	✓	✓	✓	✓
Luo and Zhong 13	✓	✓	✓		✓
Chen et al. 14	✓	✓	✓	✓	✓
Li et al. 15	✓		✓	✓	✓
Hu et al. 16	✓		✓	✓	✓
Chen and Peng 17	✓	✓			✓