31.   Operations to restore urine flow, however, can easily fail, particularly when performed by less-experienced surgeons.

32.   Performed by Thalia Theater, Hamburg, Germany.

33.   Performed by the East Coast Artists.

34.   Performed by the troupe Capitol Steps.

35.   Performed by the Kirov Opera Company.

36.   Performed by the Metropolitan Opera.

37.   Performed by the New York City Opera at the New York State Theater.

38.   Performed by the West Yorkshire Playhouse.

39.   Sellers learned to perform by watching minstrel singers like Robert Johnson and Blind Lemon Jefferson on the streets of Clarksville, Miss., where he was born.

40.   Spinal manipulation, as performed by chiropractors, osteopaths and other trained therapists, also got a nod from the panel as a potentially helpful treatment.