Research article Research articles are expected to present major advances and important new research results in connection with acupuncture and meridian studies. Review article Reviews describe new developments of significance in the field of acupuncture and meridian studies and highlight unresolved questions and future directions. Most reviews are solicited by the editors, but unsolicited submissions may also be considered for publication. Brief reports Brief reports are short peer-reviewed papers presenting novel results in basic acupuncture and meridian studies. Case reports Case reports are short peer-reviewed papers presenting novel findings in clinical studies. Technical notes Technical notes include short comments and replies on topical issues of papers published in the journal. They also present new techniques for instruments and herbal drugs. Book review Book review evaluates the book which contains acupuncture and meridian studies and related subjects. Letter to the Editor A letter to the editor is a letter sent to a publication about issues of concern to its readers.