1.   The matrix structure that we examined earlier would take account of these two variables.

2.   These twelve variables have subsequently been reduced to four main headings by later writers.

3.   For gastric acid secretion, basal serum gastrin was considered in addition to these three variables.

4.   A simple, non-invasive method which could be used in clinical pharmacology to monitor the close relationship between these two variables has so far been lacking.

5.   There would, at first sight, appear to be no connection between these two variables.

6.   A consumer essentially needs to be an accountant to solve these numerous variables.