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.
Open Windows Explorer, and then locate the file or folder for which you want to set permissions. To open Windows Explore click Start, point to All Programs, point to Accessories, and then click Windows Explorer. Right-click the file or folder, click Properties, and then click the Security tab as shown in Figure 2 below.