TI - QUestions and answers PT - JOUR DP - 1969 TA - JAMA pages = {1371-1372}, VI - 209 IP - 9 AID - 10.1001/jama.1969.03160220061037 [doi] 4100 - http://dx.doi.org/10.1001/jama.1969.03160220061037 SO - JAMA September 1, 1969 209(9):1371