11.   He underwent a minor surgical procedure Tuesday to remove excess fluid from his lungs.

12.   It said doctors were considering surgery to remove excess fluid from his lungs.

13.   It said doctors were considering a minor surgical procedure to remove excess fluid from his lungs.

14.   On Tuesday he underwent minor surgery to remove excess fluids from his lungs.

15.   On Tuesday, he underwent minor surgery to remove excess fluids from his lungs.

16.   Suffering from pneumonia, Dockery underwent a high-risk operation Thursday to remove fluid from his lungs.