41.   Doctors had never used the treatment in humans before, and they offered no promises.

42.   Doctors have long used free drug samples to let patients try new treatments or to start patients on medications quickly while they are waiting for prescriptions to be filled.

43.   Doctors may use play therapy that includes artwork and doll play.

44.   Doctors then use custom software to view the film.

45.   Doctors use the Web, according to the study, to send and receive e-mail, to find medical information and for travel information.

46.   Doctors also used a machine that drains blood from the body, cleans it and then returns it to the patient during surgery.

47.   Doctors have been using hospital volunteers or nurses when they needed interpreters, but that practice has its shortcomings.

48.   Doctors may eventually use sound waves to halt hemorrhages deep within the body without having to slice into a patient.

49.   Doctors often use air injections to fight TB strains that resist the most commonly used drugs.

50.   Doctors used to tell patients what medicine to take, Carnahan said, but now patients have their own ideas.