Pasternack FR, Fox LP, Engler DE PMID: 15655137
Geyer AS, Gill M, Husain S, Fox LP, Grossman ME PMID: 15655160
Gruvberger B, Andersen KE, Brandão FM, Bruynzeel DP, Bruze M, Frosch PJ, Goossens A, Lahti A, Maibach HI, Menné T, Orton D, Seidenari S PMID: 15701125
Acosta FL, Binder DK, Barkovich AJ, Frieden IJ, Gupta N PMID: 16206742