Population attributable fraction of gas cooking and childhood asthma: What was missed?

Competing Interests: All authors are employed by Gradient, a private environmental consulting firm. The commentary was solely conceived by the authors. The American Gas Association (AGA) provided funding for this commentary, but was not involved in either its conception or drafting. This work was conducted during the authors' normal course of employment. The authors had sole responsibility for the writing and content of this paper, which represents the professional opinions of the authors and not necessarily those of AGA. Gradient has worked with several other organizations in the past that have an interest in gas stoves and NO2 science. None were involved with the conception or drafting of this commentary.