Source of information

Group 1 (%)

Group 2 (%)

Group 3 (%)

P value

Academic curriculum

38

18

5

0.001

Reading scientific articles

30

16

7

0.02

Television

4

6

10

0.001

Internet

21

22

9

0.5

Discussion with friends

16

12

10

0.3

Radio

1

2

3

0.1

Other

3

3

3

0.5