RT Journal Article SR Electronic T1 United States Food and Drug Administration signals crackdown on caffeinated alcohol drinks JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E47 OP E48 DO 10.1503/cmaj.109-3775 VO 183 IS 1 A1 Nancy Benac YR 2011 UL http://www.cmaj.ca/content/183/1/E47.abstract