The<unk>  was a medical investigation used for patients with vitamin B (cobalamin) deficiency. The purpose of the test was to determine how well a patient is able to absorb B12 from their intestinal tract. The test is now considered obsolete and is rarely performed, and is no longer available at many medical centers. It is named for Robert F.<unk> .
Schilling test
Alkali denaturation test
Beutler test
Lea test
Nardi test
Tecumseh step test
Prausnitz–Küstner test
Sweat test