Faith and Healing - Article by Linda Gundersen with basic considerations. Annals of Internal Medicine.
Mind+Body Medicine - Article by John A Astin et al. on the state of the Science and implications for practice. Extensive bibliography. Journal of the American Board of Family Practice.
Prayer as Medicine: debunked - Extract of a weblog (Gene Expression) run by opinionated scientists focusing at the publication bias or shift in conclusions in different publications.
The Prayer Experiment - Essay by Russel Stannard reviewing philosophical and methodological considerations for experimentation into prayer. Second Opinion magazine.
Religious Commitment and Health Status - A Review of the Research and Implications for Family Medicine by Dale A Matthews et al. Archives of Family Medicine.
Rosary Prayer and Yoga Mantras - A comparative study by Luciano Bernardi et al. shows the similar effects of both forms of religious practice on cardiovascular rhythms. British Medical Journal.