TI - INcorrect symbol PT - JOUR DP - 1989 TA - JAMA pages = {3000}, VI - 262 IP - 21 AID - 10.1001/jama.1989.03430210038025 [doi] 4100 - http://dx.doi.org/10.1001/jama.1989.03430210038025 SO - JAMA December 1, 1989 262(21):3000