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Preventive measures in 3 FRE 1997–2010
| Preventive measures | Period I (100) | Period II (88) | Period III (138) | Overall (327) |
|---|---|---|---|---|
| Bronchial artery preservation | NIL | 78 | 130 | 208 |
| Thoracic duct ligation | – | All | 108 | – |
| Pre-operative chemotherapy | 6 % | 10 % | 20 % (27) | 13 % |
