TI - QUestions and answers PT - JOUR DP - 1989 TA - JAMA pages = {1854-1855}, VI - 262 IP - 13 AID - 10.1001/jama.1989.03430130130047 [doi] 4100 - http://dx.doi.org/10.1001/jama.1989.03430130130047 SO - JAMA October 6, 1989 262(13):1854