TY - JOUR T1 - An Unfounded Conclusion from a Confounded Study JF - The Journal of the American Board of Family Medicine JO - J Am Board Fam Med SP - 420 LP - 420 DO - 10.3122/jabfm.2007.04.070061 VL - 20 IS - 4 AU - Tracy L. Rupp AU - Thomas J. Balkin Y1 - 2007/07/01 UR - http://www.jabfm.org/content/20/4/420.2.abstract N2 - ER -