An eGFR blood test is used whenever there is suspicion of a kidney disease. This is usually the case in patients who are suffering from diabetes or from hypertension for a prolonged period of time.
In the case that your APP file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit APP file extensions. If your PC opens the APP file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating APP file extensions with the wrong software program.
I've done a research and it seems that the following apps can open .drw: CorelDraw Graphics Suite X7. Corel PaintShop Pro X7. ACD Systems Canvas 16. Apple AppleWorks. Micrografx Windows Draw. CADS. Caddie 2d. Windows Draw. Before buying these apps try using the demo or trial apps and check if they really work with your .drw file