Friedman PD, McCullough D, Chin MH, Saitz R. Screening and interventions for alcohol  a national survey of primary care physicians and psychiatrists.
Physicians were never asked about their screening protocols. 
mnli hypothesis: Physicians were never asked about their screening protocols.  premise: Friedman PD, McCullough D, Chin MH, Saitz R. Screening and interventions for alcohol  a national survey of primary care physicians and psychiatrists.