Szostek Jason H, Wieland Mark L, Loertscher Laura L, Nelson Darlene R, Wittich Christopher M, McDonald Furman S, Kolars Joseph C, Reed Darcy A
Department of Medicine, Mayo Clinic, Rochester, Minn, USA.
Am J Med. 2010 Jul;123(7):663-8. doi: 10.1016/j.amjmed.2010.03.010.