TY - RPRT TI - Occult functioning insulinomas: which localizing studies are indicated? AU - J A van Heerden AU - C S Grant AU - P F Czako AU - F J Service AU - J W Charboneau PY - 1992 UR - https://pubmed.ncbi.nlm.nih.gov/1455304/ ID - 1455304 ER -