Suzanne Humphries is a nephrologist turned vocal proponent of pseudoscience, woo, and worse. She has been involved with the International Medical Council on Vaccination, a front group for anti-vaccinationism, and has written several blog posts and done several podcasts and interviews (e.g. for NaturalNews) insinuating that kidney failure is caused by vaccines...
Full lunacy here: Encyclopedia of American Loons: #783: Suzanne Humphries