1.   Controlled studies to date of the effectiveness of covert sensitization offer mixed results.

2.   There have been few controlled prospective studies of the effect of transferring to human insulin on the clinical presentation of hypoglycaemia.

3.   These people rarely volunteer for investigation in controlled EEG studies.

4.   Thus, further controlled studies are clearly needed to define the true role of the various secondary infective agents detectable in the intestine of HIV infected patients.

5.   Clearly the nature of this relationship requires further investigation, particularly as no other case controlled studies have reported on transit time in relation to faecal bile acid concentration.

6.   Medical therapy of diarrhoea caused by chronic radiation enteritis has been largely empirical and there have been no adequate controlled studies.