conclusions the mode of action of prf is far from being completely elucidated. the high frequency current induces an electric field that in turn seems to influence the immunity, the inflammation and other pain conducting mechanisms. our findings suggest an effect distal from the application of the current. it reaches targets that are difficultly attainable by any other means of current applicat...

Questions from patients about analgesic pharmacotherapy and responses from authors are presented to help educate patients and make themmore effective self-advocates. The topic addressed in this issue is postherpetic neuralgia, symptoms, risk factors, and treatment.

The Editors welcome submissions for possible publication in the Letters section. Authors of letters should: • Include no more than 300 words of text, three authors, and five references • Type with double-spacing • Send three copies of the letter, an authors’ form (see Table of