Background: Monogenic hypertension syndromes result from a single genetic mutation and present with severe. refractory hypertension. distinct laboratory abnormalities. and a positive family history. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC550-WUH721816ALE6L0-0F38460-16TB-7-2K-RPM-SATA-6Gb-s-512e-ISE-3-5in-Hard-Drive/