RT Journal Article SR Electronic T1 Letter: Corticosteroids contained in Mexican cures for arthritis and asthma JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 299 OP 299 VO 114 IS 4 A1 Blackburn, J. L. A1 Hindmarsh, K. W. YR 1976 UL http://www.cmaj.ca/content/114/4/299.abstract