PCPs are usually internists, pediatricians, family doctors, geriatricians, or general practitioners (GPs). Pediatricians, as well as internists, commonly misdiagnose Fabry disease. Originally, the hospitalist community was primarily made up of general internists, family physicians and pediatricians. Hospitalists are internists and other physicians who specialize in the care of hospitalized patients. Nephrologists are internists, and urologists are surgeons, whereas both are often called "kidney doctors". Skin biopsies are also done by family physicians, internists, surgeons, and other specialties. General practitioners would be the surgeons, the obstetricians, and the internists for their given communities. Such 'hospitalists' now make up about 19% of all US " general internists". Four of the physicians specialize in family practice and two are internists. Internists often have subspecialty interests in diseases affecting particular organs or organ systems. Physicians (not only internists) who successfully pass board exams receive "board certified" status. The primary care sector consists of health care professionals such as internists and family practitioners. He was responsible for establishing a medical psychiatric liaison service staffed largely by internists. The training and career pathways for internists vary considerably across the world.