Is a shortened version of the Grace After Meals Acceptable? If so, what berochos is it composed of? Also, under what circumstances is it acceptable?

One may make a shortened Grace after Meals in the instance when one is very ill or any other extreme situation. The shortened grace is composed of all the Brachot in a shortened form and can be found in the Vezot Haberacha on page 144. Rabbi Chaim Shreiber