A parietal cell antibody test may be used along with or following an intrinsic factor antibody test to help determine the cause of a vitamin B12 deficiency and to help confirm a diagnosis of pernicious anemia.
1 Place leg of lamb on a rack in a roasting pan. 2  Preheat oven to 325 degrees and bake leg of lamb uncovered for 30 minutes per pound or until internal temperature reaches 120 to 130 degrees at the thickest point. Preheat oven to 325 degrees and bake leg of lamb uncovered for 30 minutes per pound or until internal temperature reaches 120 to 130 degrees at the thickest point.
1 Insert thyme and a sliver of orange peel into each slit. Place lamb fat side up on a rack in a shallow roasting pan. Insert meat thermometer in center of thickest portion of meat.  Roast lamb in preheated oven for 2 1/2 to 3 hours.