Table 2.

Sample characteristics

Place of data collection	Australia (Melbourne)	Israel (Central, Tel-Aviv and Jerusalem districts)	England (London)
Gender:
Male	16	12	8
Female	9	8	12
Age:
Less than 30	0	0	2
30–39	1	5	12
40–49	5	5	3
50–59	15	7	3
60–69	4	3	0
Year of practice:
Less than 5	1	2	12
5–10	1	5	2
11–20	3	4	1
21–30	15	9	5
More than 30	5	0	0
Total N	25	20	20