Study (year) | T1 | T2 | T3 | T4 |
Selcukbiricik et al. (2013) [93] | 92 | 74 | 41 | 0 |
Zhou et al. (2010) [82] | 100 | 74 | 57 | 0 |
Giordano et al. (2004) [31] | 78 | 67 | 40 | 19 |
Vaizey et al. (1999) [194] | 88 | 50 | 27 | 5 |
Ribeiro et al. (1996) [86] | 76 | 66 | 43 | - |