11.   His recovery was complicated by breathing problems after phlegm blocked his windpipe, forcing doctors to perform a tracheotomy.

12.   His recovery was complicated by pneumonia and bronchitis.

13.   His recovery was complicated by pneumonia and bronchitis, and he has not yet returned to work.

14.   His recovery was complicated by breathing problems after his windpipe was blocked by phlegm, and the president was put on a respirator last Saturday.

15.   His recovery was complicated by breathing problems after his windpipe was blocked by phlegm, and the president was put on respirator Saturday last week.

16.   His recovery was complicated by bronchitis and doctors had to perform a tracheotommy to help him breathe after a mild case of pneumonia developed.

17.   His recovery was complicated by bronchitis and doctors had to perform a tracheotomy to help him breathe after a mild case of pneumonia developed.

18.   Last year he had an operation to shorten a bone in one of his big toes but the expected full recovery has been complicated by the arthritis.

19.   Wreckage is buried deep in thick clay, complicating the recovery.