| Author | n | Period | Age | Female | Airway involvement | Deaths |
| Gao L et al. [16] | 23 | 1996-2011 | - | - | 10 | 3 |
| Hong G et al. [17] | 12 | 2004-2011 | 48 | 5 | 12 | 9 |
| Zhang JQ et al. [18] | 13 | 2000-2006 | 50 | 4 | 12 | 1 |
| Shi XH et al. [19] | 56 | 2006 | 45 | 18 | 38 |
|
| Maimon N et al. [20] | 3 | 1995-2007 | 44 | 3 | 3 | 2 |