title: Comment on a letter to the editor: Is the pneumoretroperitoneum really developed after acupuncture?
authors.forename: Young-Tae
authors.initials: YT
authors.lastname: Bak
authors.forename: Jin K
authors.initials: JK
authors.lastname: Hwang
mesh_terms: D015670:Acupuncture Therapy / Q000009:adverse effects*; D006801:Humans; D012188:Retropneumoperitoneum / Q000209:etiology*