Reply to: "Recent Advances in Circumferential Tracheal Replacement and Transplantation". Issue 4 (10th March 2016) - Hamilton, N. J.; Kanani, M.; Roebuck, D. J.; Hewitt, R. J.; Cetto, R.; McLaren, C. A.; Butler, C. R.; Crowley, C.; Janes, S. M.; O'Callaghan, C.; Culme‐Seymour, E. J.; Mason, C.; et al.