Source:
The New York times on the Web [N Y Times Web] 1990 May 17, pp. B11.Publisher: New York Times Country of Publication: United States NLM ID: 9877126 Publication Model: Print Cited Medium: Print ISSN: 0362-4331
Source:
JAMA [JAMA] 1990 Feb 09; Vol. 263 (6), pp. 791.Publisher: American Medical Association Country of Publication: United States NLM ID: 7501160 Publication Model: Print Cited Medium: Print ISSN: