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(2015) Measurements of plasma metanephrines by immunoassay <i>vs.<\/i> liquid chromatography with tandem mass spectrometry for diagnosis of pheochromocytoma. Eur J Endocrinol 172: 251\u2013260.","DOI":"10.1530\/EJE-14-0730"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12 Usher-Smith JA, Sharp SJ, Griffin SJ (2016) The spectrum effect in tests for risk prediction, screening, and diagnosis. BMJ 353: i3139.","DOI":"10.1136\/bmj.i3139"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13 Procopiou M, Finney H, Akker SA, Chew SL, Drake WM, et al. (2009) Evaluation of an enzyme immunoassay for plasma-free metanephrines in the diagnosis of catecholamine-secreting tumors. Eur J Endocrinol 161: 131\u2013140.","DOI":"10.1530\/EJE-09-0172"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14 Sarathi V, Pandit R, Jagtap V, Lila AR, Bandgar TR, et al. 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