Table 1 Characteristic of the included studies
literature | patient races | study design |
|---|---|---|
Ding H, 2005 [8] | Asian | randomized controlled study with description of withdrawals and dropouts |
Zhang Q, 2009 [9] | Asian | randomized controlled study with description of withdrawals and dropouts |
88% Asian | ||
Leung N, 2009 [10] | 12% non-Asian | randomized controlled study with description of withdrawals and dropouts |
Yang F, 2010 [11] | Asian | randomized controlled study with description of withdrawals and dropouts |
Zou S, 2010 [12] | Asian | randomized controlled study with description of withdrawals and dropouts |
Huang H, 2010 [13] | Asian | randomized controlled study with description of withdrawals and dropouts |