RT Journal Article SR Electronic T1 Studies of “natural” remedies for the common cold: pitfalls and pratfalls JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1051 OP 1052 DO 10.1503/cmaj.051208 VO 173 IS 9 A1 Ronald B. Turner YR 2005 UL http://www.cmaj.ca/content/173/9/1051.abstract