This study was publised in 2000, but I just stumbled on it today. It's an interesting paper, because it validates what we've been teaching (?preaching?) for years. Family physicians are trained to address psychological issues as primary medical problems. This is a required longitudinal component of family medicine education. While many internal medicine residencies do educate their residents in this domain .. many do not .. and this is not explicitly a component of their training. All family physicians are trained in this way.
Now there is a study that demonstrates that family physicians actually are more attentive to psychological problems.