Pfab F, Valet M, Sprenger T, Toelle TR, Athanasiadis GI, Behrendt H, Ring J, Darsow U. Short-Term Alternating Temperature Enhances Histamine-Induced Itch: A Biphasic Stimulus Model. Journal of Investigative Dermatology. 2006 Dec;126(12):2673–8. doi: 10.1038/sj.jid.5700577.