Chromogranin A as Serum Marker for Neuroendocrine Neoplasia: Comparison with Neuron-Specific Enolase and the α-Subunit of Glycoprotein HormonesFrank Nobels, Steven W. J. Lamberts, Wouter W. de Herder et al.|The Journal of Clinical Endocrinology & Metabolism|1997Cited by 353