TI - INdex to advertisers PT - JOUR DP - 1989 TA - JAMA pages = {3378}, VI - 262 IP - 23 AID - 10.1001/jama.1989.03430230171051 [doi] 4100 - http://dx.doi.org/10.1001/jama.1989.03430230171051 SO - JAMA December 15, 1989 262(23):3378