21.   Psychological factors have also been indicated as a possible cause for some cases of idiopathic constipation, but there is no strong evidence to support this.

22.   Degeneration of intrinsic enteric neurones has also been suggested as a possible cause, but it might be the secondary result of long lasting bowel distension and laxative abuse.

23.   Definitive evaluation of the possible causes of oesophagopharyngeal reflux awaits the recording of UOS pressure during well defined episodes of such reflux.

24.   There are many possible causes and often the likely cause is suggested from the routine history and examination of the patient.

25.   The physician must establish a sympathetic rapport with the patient to help elucidate possible causes and contributing factors.

26.   The inexperienced clinician who undertakes unnecessary investigations to exclude all possible causes for each abnormal finding is doing the patient a disservice by delaying appropriate treatment.

27.   Experts met in Spain in September to discuss the problem but delegates failed to agree on a possible cause.

28.   A new theory has emerged tonight about the possible cause of the Hercules crash in which nine airmen died.

29.   Police investigating the accident in which Leslie Crowther was critically injured have ruled out a mechanical failure as a possible cause.

30.   The objective of this chapter is to consider the possible causes of this cyclical movement in economic activity.