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.
What is an USER file? The .user file extension is most commonly associated with the Visual Studio software application. Visual Studio is used to develop software applications for the Internet and for Microsoft Windows. The USER files contain the user preferences and are used to load and save project preferences for a specific program user. The .user file extension is also used by the Linux operating system.