Table 1 Questionnaires sent out and received back by the end of December 2014
| Sent out | Returned | Response rate (%) | |
|---|---|---|---|
| (A) Cardiovascular surgery | 602 | 589 | 97.8 |
| (B) General thoracic surgery | 793 | 761 | 96.0 |
| (C) Esophageal surgery | 577 | 559 | 96.9 |
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