Altered sympathetic nervous reactivity and norepinephrine transporter expression in patients with the postural tachycardia syndrome - Lambert, E.; Eikelis, N.; Esler, M.; Dawood, T.; Schlaich, M.; Bayles, R.; Socratous, F.; Agrotis, A.; Jennings, G.; Lambert, G.; Vaddadi, G. (Autonomic Neuroscience: Basic & Clinical, 2008)