Pharmacological MRI in awake rats reveals neural activity in area postrema and nucleus tractus solitarius: Relevance as a potential biomarker for detecting drug-induced emesis. - Chih-Liang Chin; Gerard B. Fox; Vincent P. Hradil; Mark A. Osinski; Steve P. McGaraughty; Pamela D. Skoubis; Bryan F. Cox; Yanping Luo (NeuroImage, 2006)