docs: def get(self, request, *args, **kwargs):
          '''The queryset is filtered by measurements of animals which are part of that strain.'''
          cohort = get_object_or_404(Cohort, slug=self.kwargs['slug'])
          animals = cohort.animals.all()
          measurements = Measurement.objects.filter(animal=animals)    
          return data_csv(self.request, measurements)