TI - DEnmark PT - JOUR DP - 1959 TA - Journal of the American Medical Association pages = {1443}, VI - 170 IP - 12 AID - 10.1001/jama.1959.63010120014021 [doi] 4100 - http://dx.doi.org/10.1001/jama.1959.63010120014021 SO - Journal of the American Medical Association July 18, 1959 170(12):1443