Fig. 1

CONSORT flow diagram. Participants in the usual care group were offered genotyping at the 3-month follow-up. IM intermediate metabolizer, NM normal metabolizer, PM poor metabolizer, UM ultrarapid metabolizer.
CONSORT flow diagram. Participants in the usual care group were offered genotyping at the 3-month follow-up. IM intermediate metabolizer, NM normal metabolizer, PM poor metabolizer, UM ultrarapid metabolizer.