31.   If a small tumor develops, Rist could undergo the procedure again.

32.   If you already have a dry eye condition, you might not be the right person to undergo this procedure.

33.   In early May, Plager himself became a patient, undergoing the procedure in both eyes.

34.   In many of those cases, the authors wrote, the women underwent follow-up procedures, including biopsies.

35.   In the past, bladder cancer patients have undergone a procedure known as a cystoscopy, often on a regular basis, to detect a recurrence of their disease.

36.   In the future he may have to undergo a procedure in which a tube is inserted through the mouth to widen the esophageal narrowing.

37.   Keller underwent the procedure last Wednesday in Los Angeles, where Dr. Bert Mandelbaum removed a marble-sized fragment from the elbow.

38.   Law enforcement officials said they were trying to determine how many patients had undergone medical procedures in the clinic.

39.   Mrs. Perry-Rogers had undergone the procedure with her own embryos, but she had not become pregnant.

40.   Nearly half a million people undergo the procedure each year in the United States.