PTH and hypercalcemia disease: Nussbaum Nussbaum SR SR Zahradnik Zahradnik RJ RJ Lavigne Lavigne JR JR Brennan Brennan GL GL Nozawa-Ung Nozawa-Ung K K Kim Kim LY LY Highly sensitive two-site immunoradiometric assay of parathyrin, and its clinical utility in evaluating patients with hypercalcemia Highly sensitive two-site immunoradiometric assay of parathyrin, and its clinical utility in evaluating patients with hypercalcemia Clin Chem Clin Chem 1987 1987 33 33 1364 1364 7 7 10.1093/clinchem/33.8.1364 10.1093/clinchem/33.8.1364 3608153 3608153