title: Doctor Berglund warns members of union pitfalls.
mesh_terms: D003098:Collective Bargaining / Q000331:legislation & jurisprudence*; D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000331:legislation & jurisprudence*; D008824:Michigan; D010820:Physicians / Q000331:legislation & jurisprudence*; D012955:Societies, Medical; D014481:United States