1. Cypress BK: Characteristics of physician visits for back symptoms: a national perspective. Am J Public Health. 1983, 73: 389-395.
2. Licciardone JC, Herron KM: Characteristics, satisfaction, and perceptions of patients receiving ambulatory healthcare from osteopathic physicians: a comparative national survey. J Am Osteopath Assoc. 2001, 101: 374-385.
3. Licciardone JC: Awareness and use of osteopathic physicians in the United States: results of the Second Osteopathic Survey of Health Care in America (OSTEOSURV-II). J Am Osteopath Assoc. 2003, 103: 281-289.
4. Agency for Health Care Policy and Research [AHCPR]: Acute low back problems in adults. Clinical Practice Guideline 14. 1994, Rockville, MD, US Department of Health and Human Services
5. Kuchera ML, DiGiovanna EL, Greenspan PE: Efficacy and complications. Foundations for Osteopathic Medicine. Edited by: Ward RC. 2003, Philadelphia, PA: Lippincott Williams & Wilkins, 1143-1152. 2