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Axén, Iben, Irene B. Jensen, Andreas Eklund, Laszlo Halasz, Kristian Jørgensen, Fredrik Lange, Peter W. Lövgren, Annika Rosenbaum, and Charlotte Leboeuf-Yde. The Nordic Maintenance Care Program: When Do Chiropractors Recommend Secondary and Tertiary Preventive Care for Low Back Pain? BioMed Central, 2009.

Axén, Iben, et al. The Nordic Maintenance Care Program: When Do Chiropractors Recommend Secondary and Tertiary Preventive Care for Low Back Pain? BioMed Central, 2009.