Group hysteria! Defining GPOs in the 1990s.
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SMG Marketing Group, Chicago, USA.
D003625:Data Collection; D016527:Drug Costs / Q000706:statistics & numerical data / Q000639:trends; D004865:Equipment and Supplies, Hospital / Q000191:economics / Q000706:statistics & numerical data; D017754:Group Purchasing / Q000145:classification / Q000191:economics* / Q000706:statistics & numerical data; D017721:Hospital Costs / Q000706:statistics & numerical data* / Q000639:trends; D014481:United States