Patient Acceptance of Health Care

• Northern Orthopaedic Division, Klinik Hjoerring — Hjørring, Northern Jutland, Denmark

• Ste-Justine Hospital — Montreal, Quebec, Canada

• Primary care Centers affiliated with the Spanish Back Pain Research Network — Throughout Spain, Spain

• The Cooper Institute — Dallas, Texas, United States

• University of Iowa General Clinical Research Center — Iowa City, Iowa, United States

• Johns Hopkins Hospital — Baltimore, Maryland, United States

• Patronato Municipal de Deportes de Torremolinos — Torremolinos, Málaga, Spain

• Virginia Commonwealth University — Richmond, Virginia, United States

Not specified

• EMRI — Tehran, Iran