Rebel Doc Blogroll Dr. Kevin Campbell is a cardiologist specializing in electrophysiology, with a practice in North Carolina. He writes at http://drkevincampbellmd.wordpress.com and is on Twitter @DrKevinCampbell Dr. Kris Held is an ophthalmologist in private practice in Texas. She writes at http://krisheldmd.wordpress.com and is on Twitter @kksheld. Dr. Karen Sullivan Sibert is a Los Angeles anesthesiologist. She writes at http://apennedpoint.com and is on Twitter @KarenSibertMD Add your name to our blogroll.