Nondrinkers do not appear to have a higher risk of esophageal cancer. Brooks and colleagues say health care providers should ask their patients about whether they experience redness after drinking alcohol. If so, this should be treated as a warning sign of heightened esophageal cancer risk, requiring screening.
These add-ons are equivalent to saving the file as a .dwg or .dxf file in the user interface. To save the files through the user interface, click Save As on the File menu. In the Save As dialog box, on the Save as type list, select AutoCAD Drawing (*.dwg) or AutoCAD Interchange (*.dxf).
1 Adobe After Effects can open and use .ai files for video editing. 2  Cinema 4D can import .ai files for conversion to 3D images or for basic editing. 3  CorelDRAW (proprietary program) can natively edit this file format with some limitations. 4  Corel Paint Shop Pro (proprietary program) can natively edit this file format.