| PPG | photoplethysmography; platelet proteoglycan; portal pressure gradient |
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| PSG | peak systolic gradient; phosphate, saline, and glucose; polysomnogram; presystolic gallop; pregnancy... |
| PVG | pulmonary valve gradient |
| RAGE | rapid gradient echo |
| SDG | sucrose density gradient |
| liver, artificial | Devices for simulating the activities of the liver. They often consist of a hybrid between both biological and artificial materials. (12 Dec 1998) |
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