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ND, no data available
| Author | Type IA (%) | Type IB (%) | Type IC (%) | Type II (%) | Type IIIA (%) | Type IIIB (%) | Type IIIC (%) | Type IV (%) | Type V (%) |
| Polguj et al. (2011) [4] | 15.10 | 3.50 | 5.80 | 2.30 | 8.20 | 2.30 | 44.20 | 7.00 | 11.60 |
| Ahmed (2018) [14] | 15.38 | 24.61 | ND | 1.54 | 21.53 | 26.15 | ND | 3.08 | 7.69 |
| Polguj et al. (2013) [28] | 14.12 | 3.08 | 6.98 | 1.95 | 2.92 | 0.97 | 52.27 | 4.72 | 12.99 |
| Vyas et al. (2012) [32] | 6.00 | 5.00 | 9.33 | 2.67 | 2.33 | 2.67 | 37.67 | 3.67 | 30.67 |
