TI - MInneapolis not st louis PT - JOUR DP - 1979 TA - JAMA pages = {713-718}, VI - 242 IP - 8 AID - 10.1001/jama.1979.03300080013016 [doi] 4100 - http://dx.doi.org/10.1001/jama.1979.03300080013016 SO - JAMA August 24, 1979 242(8):713