The Permanente Journal advances knowledge in scientific research, clinical medicine, and innovative health care delivery. Sponsored by the National Permanente Medical Groups, The Permanente Journal is a peer-reviewed journal of medical science, social science in medicine, and medical humanities. The Permanente Journal (ISSN 1552-5767) is published quarterly by The Permanente Press. The Permanente Journal is available online (ISSN 1552-5775) at www.thepermanentejournal.org. Physicians may earn up to 1 AMA PRA Category 1 Credit per article for reading and analyzing the designated CME articles published in each edition of TPJ. Each edition has four articles available for review. Other clinicians for whom CME is acceptable in meeting educational requirements may report up to four hours of participation. The Permanente Journal welcomes requests for reprints and reproduction. Use of any and all material published in The Permanente Journal is copyrighted and protected. The Permanente Journal offers free full-text access for all online content. Use as a handout, reprinting, republishing, adapting, or any other use, requires permission.