Complex sentence: In Germany, most acute treatment consists of C1-INH concentrate from donor blood, which must be administered intravenously; however, in most European countries, C1-INH concentrate is only available to patients who are participating in special programs.
Split into simpler sentences: In Germany, most acute treatment consists of C1-INH concentrate from donor blood, which must be administered intravenously. However, in most European countries, C1-INH concentrate is only available to patients who are participating in special programs.