Effects of acute nicotine on brain function in healthy smokers and non-smokers: Estimation of inter-individual response heterogeneity. - Ulrich Ettinger; Steven C. R. Williams; Dhanesh Patel; Tanja M. Michel; Agwawumma Nwaigwe; Alejandro Cáceres; Mitul A. Mehta; Anantha P. Anilkumar; Veena Kumari (NeuroImage, 2009)