tokens: After atropine the CD25 was unchanged after placebo ( 2 . 3 + / - 0 . 3 micrograms ) and atenolol ( 7 . 7 + / - 1 . 3 micrograms ) ; it was reduced after propranolol ( 24 . 8 + / - 5 . 0 micrograms ) , but remained different from atenolol .