in 10 electronic databases

run in 7 languages

and completed by contacts with authors & experts in the field

1) Injuries Group's specialised register

2) Cochrane Controlled Trials Register (2000, issue #4)

3) TRANSPORT (1968-11/98) - TRIS + TRANSDOC + IRRD

4) MEDLINE (1966-5/99)

5) EMBASE (1980-1/99)

6) ERIC (1992-9/98)

7) PSYCLIT (1898-12/1998)

8) SPECTR (7/2000)