Input (grade 7): While tracheostomy may have possibly been portrayed on ancient Egyptian tablets, "Tracheostomy: Evolution of an Airway," Steven E. Sittig and James E. Pringnitz, AARC Times, February 2001.
Output (grade 6): Tracheostomy was written about in ancient Egyptian tablets, "Tracheostomy: Evolution of an Airway," Steven E. Sittig and James E. Pringnitz, AARC Times, February 2001.