Maria I. Bokarewa, Malin C. Erlandsson, Jan Bjersing, Mats Dehlin, and Kaisa Mannerkorpi, Smoking is Associated with Reduced Leptin and Neuropeptide Y Levels and Higher Pain Experience in Patients with Fibromyalgia.Mediators of Inflammation, vol. 2014, Article ID 627041, 8 pages, 2014. doi:10.1155/2014/627041