Comment on

• Reference ranges for exhaled nitric oxide derived from a random community survey of adults.

  Travers J, Marsh S, Aldington S, Williams M, Shirtcliffe P, Pritchard A, Weatherall M, Beasley R. Travers J, et al. Am J Respir Crit Care Med. 2007 Aug 1;176(3):238-42. doi: 10.1164/rccm.200609-1346OC. Epub 2007 May 3. Am J Respir Crit Care Med. 2007. PMID: 17478616
• The use of exhaled nitric oxide to guide asthma management: a randomized controlled trial.

  Shaw DE, Berry MA, Thomas M, Green RH, Brightling CE, Wardlaw AJ, Pavord ID. Shaw DE, et al. Am J Respir Crit Care Med. 2007 Aug 1;176(3):231-7. doi: 10.1164/rccm.200610-1427OC. Epub 2007 May 11. Am J Respir Crit Care Med. 2007. PMID: 17496226 Clinical Trial.