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Thirty-minute preference test in male Wistar rats (n=10) allowed to self-administer the supersaccharin (1.5% w/v glucose and 0.4% w/v saccharin) and the glucose solution (1.5% w/v glucose) in a two-lever choice operant condition. Panels show M±SEM of a lever presses and b preference, calculated as the percent of total intake. ***p<0.001, difference from glucose (paired Student’s t tests)
