TI - QUestions and answers PT - JOUR DP - 1989 TA - JAMA pages = {105-109}, VI - 261 IP - 1 AID - 10.1001/jama.1989.03420010117047 [doi] 4100 - http://dx.doi.org/10.1001/jama.1989.03420010117047 SO - JAMA January 6, 1989 261(1):105