Traduction de «explaining which actions are efficacious » (Néerlandais → Français) :

They decided to write a joint letter explaining which actions are efficacious, which have little or no effect and which are likely to have negative results.
Il a été décidé d’écrire une lettre commune qui explique quelles interventions sont efficaces, lesquelles n’ont (presque) pas d’effet et quels programmes risquent d’avoir des conséquences négatives.

However, such medicines do have to meet a number of quality and efficacy conditions, which are investigated in connection with the ED.
However, such medicines do have to meet a number of quality and efficacy conditions, which are investigated in connection with the ED.