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Craving scores of the three groups during the 4-day treatment time. A significant main effect of day (F [2, 2.776] = 139.292, P < 0.0005) and group (F [2, 58] = 45.823, P < 0.0005) and group by day interaction (F [2, 5.552] = 29.306, P < 0.0005) were detected
