Aini FN, Syafa’ah I. Heimlich Valve as an Ambulation Management of Persistent Pneumothorax or Fluidopneumothorax. JR [Internet]. 2021 May 31 [cited 2024 Aug. 11];7(2):86-92. Available from: https://e-journal.unair.ac.id/JR/article/view/22088