Mitchell C, Jennings C, Brambilla D, Aldrovandi G, Amedee AM, Beck I, Bremer JW, Coombs R, Decker D, Fiscus S, Fitzgibbon J, Luzuriaga K, Moye J, Palumbo P, Reichelderfer P, Somasundaran M, Stevens W, Frenkel L. Diminished human immunodeficiency virus type 1 DNA yield from dried blood spots after storage in a humid incubator at 37 degrees C compared to -20 degrees C. J Clin Microbiol. 2008 Sep; 46(9):2945-9.