A Comparison of the Capacities of Isomers of Amphetamine, Deoxypipradrol and Methylphenidate to Inhibit the Uptake of Tritiated Catecholamines Into Rat Cerebral Cortex Slices, Synaptosomal Preparations of Rat Cerebral Cortex, Hypothalamus and Striatum and Into Adrenergic Nerves of Rabbit Aorta