A lightweight, ergonomically beneficial, hydrodynamic, and volumetrically efficient hybrid pressure vessel having at least two longitudinally extending, semi-cylindrical sections with flattened rib portions at a common interface between the sections. The inv fusion results in expression of the CBF\u03b2-SMMHC fusion protein in the blood cells of afflicted patients. Exemplary sulfidizing compounds are H2S, Na2S, K2S, 2S, and CaSx.