Comment in

• Prevalence and patterns of adult yoga use in the United States: results of a national survey.

  Saper RB, Eisenberg DM, Davis RB, Culpepper L, Phillips RS. Saper RB, et al. Altern Ther Health Med. 2004 Mar-Apr;10(2):44-9. Altern Ther Health Med. 2004. PMID: 15055093
• Feasibility of conducting a clinical trial on Hatha yoga for chronic low back pain: methodological lessons.

  Jacobs BP, Mehling W, Avins AL, Goldberg HA, Acree M, Lasater JH, Cole RJ, Riley DS, Maurer S. Jacobs BP, et al. Altern Ther Health Med. 2004 Mar-Apr;10(2):80-3. Altern Ther Health Med. 2004. PMID: 15055099 Clinical Trial. No abstract available.