There are three main phases of clinical trials, and physicians would be approached, in my view, more around phase II and III in terms of conducting and signing on for sites, but I would ask my colleagues to add to that.
Les essais cliniques comprennent trois phases principales, et les médecins interviendraient plutôt, selon moi, aux phases II et III, pour collaborer ou proposer des lieux, mais mes collègues en savent plus que moi à ce sujet.