TI - PHysical fitness and ill health PT - JOUR DP - 1924 TA - Journal of the American Medical Association pages = {1848}, VI - 83 IP - 23 AID - 10.1001/jama.1924.02660230042011 [doi] 4100 - http://dx.doi.org/10.1001/jama.1924.02660230042011 SO - Journal of the American Medical Association December 6, 1924 83(23):1848