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Perkins P, 
Cooksley CD and 
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1) The first study by Perkins et al. (the current study), at the end of the first line, “Not significant” should be replaced with “Marginally significant”. This does not change the results of the study. It was an error in the comparison table only. 2) The study by Bain et al, under Population Description, “Atlanta MSA” should be replaced with “metropolitan Atlanta”. The number of counties in the MSA is greater than in metropolitan Atlanta. 3) The study by Gregorio et al., under Population/study years, “Health Insurance Plan Greater N.Y. 1957-1965” should be replaced with “Roswell Park Memorial Institute 1957-1965”. The N.Y. insurance plan was not part of this study.