81.   Splenic function was assessed by counting the number of erythrocyte indentations or pits using the method described by Corazza.

82.   Tissue samples were assessed biochemically for the neutrophil marker enzyme, myeloperoxidase, using the method of Krawisz et al.

83.   Several methods have been used to detect this response, including agglutination, complement fixation, and enzyme linked immunosorbent assay.

84.   The least square method was used in calculating the correlations.

85.   Non-parametric statistical methods were used whenever possible, because neither the basic data nor the log transformed data were normally distributed.

86.   The direct standardisation method was used to correct for inadvertent imbalance of risk factors between the three treatment groups.

87.   This section describes how to use either method.

88.   Buccal epithelial cells from eight healthy laboratory staff were prepared using established methods.

89.   The logit estimate of the common odds ratio was calculated using the method of Woolf.

90.   There is also an obligation, however, to use effective methods.