Table 2 Studies with reported data on the origin of the ICBN
Nation | Type of evaluation | Number of ICBN | T1 | T2 | T1 & T2 | T2, & T3 | T3 | T1,T2,T3 | |
|---|---|---|---|---|---|---|---|---|---|
Nayak 2018 [28] | Asia | Cadaveric dissection | 130 | 5 | 98 | 0 | 0 | 27 | 0 |
Kumar 2016 [3] | Asia | Intraoperative dissection | 50 | 0 | 48 | 2 | 0 | 0 | 0 |
Zhu 2014 [4] | Asia | Intraoperative dissection | 152 | 2 | 118 | 17 | 6 | 0 | 9 |
Khan 2012 [20] | Europe | Intraoperative dissection | 73 | 0 | 66 | 0 | 5 | 2 | 0 |
Verma 2009 [21] | Asia | Intraoperative dissection | 69 | 0 | 68 | 1 | 0 | 0 | 0 |
Loukas 2006 [23] | America | Cadaveric dissection | 200 | 0 | 146 | 0 | 50 | 4 | 0 |
Cunnick 2001 [26] | Europe | Intaroperative dissection | 50 | 0 | 41 | 4 | 0 | 0 | 0 |
O’Rourke 1999 [27] | Australia | Cadaveric dissection | 28 | 1 | 26 | 0 | 0 | 1 | 0 |