7Cavanaugh K, Park A. Postparotideetomy fistula: a different treatment for an old problem [ J ]. Int J Pediatr Otorhinolar- yngol, 1999,47 ( 3 ) :265 - 268.
8Amir I, Morar P, Belloso A. Postoperative drainage in head and neck surgery [ J ]. Ann R Coll Surg Engl,2010,92 (8) : 651 - 654.