81.   We were unable to predict the outcome of treatment on the basis of functional parameters, thus confirming the finding of previous studies.

82.   Our observation that short term treatment with omeprazole increases serum pepsinogen A and C levels confirms previous studies.

83.   The second finding is consistent with our previous study showing that the response to pentagastrin stimulation in duodenal ulcer patients is not changed after eradication of H pylori.

84.   Previous studies of the effect of smoking on gall bladder disease have reported conflicting results.

85.   Previous studies have not shown that the heater probe is less effective than other types of endoscopic treatment, whose efficacy is already proved.

86.   Previous studies have shown an increasing prevalence of Helicobacter pylori antibody titres with increasing age in Western populations.

87.   Patients had more consistent benefit from oxygen than hypoxaemic patients with such pulmonary disease in previous studies.

88.   This book contains many descriptive data, most of which had either been previously published or confirm previous studies.

89.   Our study, which avoided the methodological and analytical problems of previous studies, found no effect of essential fatty acid supplementation in atopic dermatitis.

90.   This allowed a comparison to be made between matriculated and non matriculated students and between those students with and without recent previous study experience.