tokens: The release rate of epinephrine ( control , 6 . 7 + / - 0 . 6 ng / kg / min ) declined immediately during infusions of atrial natriuretic factor to a minimum of 49 + / - 5 % of control ( p less than 0 . 001 ) during 0 . 1 microgram / kg / min and to 63 + / - 5 % ( 0 . 1 greater than p greater than 0 . 05 ) or 95 + / - 13 % ( not significant ) during 0 . 3 or 1 . 0 microgram / kg / min .