51.   Further progress in treatment will depend on referring patients to clinical trials that assess potential therapeutic advances.

52.   He frequently refers patients to medical doctors.

53.   He also acknowledged that he refers patients to Wilner.

54.   He even refers some patients for the treatment.

55.   He found some encouragement when a psychiatrist referred a patient to him.

56.   His patients often are referred by naturopaths or homeopathic physicians.

57.   HMOs refer patients to clinics.

58.   HMO officials say their plans are structured so that doctors have little if anything to gain by not referring a patient for a diagnostic test or a specialist consultation.

59.   In many companies, primary care physicians are paid less if they refer patients to specialists or hospital care.

60.   In other words, doctors must be willing to refer patients to such trials and patients must be willing to enter them.