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Variability in physician referral decisions.
Starfield B, Forrest CB, Nutting PA, von Schrader S. Starfield B, et al. Among authors: von schrader s. J Am Board Fam Pract. 2002 Nov-Dec;15(6):473-80. J Am Board Fam Pract. 2002. PMID: 12463293 Free article.