Question: is this a 2) strong advice, 1) weak advice 0) no advice?

In accordance with current European and American guidance (Center for Drug Evaluation and Research, 1978; Committee for Proprietary Medical Products, 2002), the use of relapse and recurrence rates as primary outcome measures in continuation treatment and long-term trials is recommended, albeit without providing an operational definition of relapse and recurrence with respect to psychiatric scales or other diagnostic criteria. 
user
This is a strong advice
assistant