translate English to French: Formal attempts at evaluating even this limited perspective of costs are few. Even more challenging is the documentation of adverse effects.
` e ` ce jour, peu de chercheurs ont tent´ de calculer A e sommairement les coˆ ts de ces interventions. u La d´ termination des taux d’effets ind´ sirables soul` ve encore e e e plus de difficult´ s.