title: The myth of micro-data.
authors: Group Health, Minneapolis, MN 55414.
authors: G C
authors: GC
authors: Halvorson
authors: D J
authors: DJ
authors: Mangen
authors: K M
authors: KM
authors: Cooney
mesh_terms: D002585:Cesarean Section / Q000706:statistics & numerical data; D003625:Data Collection / Q000592:standards; D003627:Data Interpretation, Statistical; D005260:Female; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D006300:Health Services Misuse / Q000706:statistics & numerical data*; D006801:Humans; D007345:Insurance Claim Review / Q000706:statistics & numerical data*; D014481:United States