In response to: Helicopter versus ground ambulance: review of national database for outcomes in survival in transferred trauma patients in the USA Michaels D, Pham H, Puckett Y, et al Trauma Surg Acute Care Open 2019;4:e000211
In response to: Helicopter versus ground ambulance: review of national database for outcomes in survival in transferred trauma patients in the USA Michaels D, Pham H, Puckett Y, et al Trauma Surg Acute Care Open 2019;4:e000211