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

In this Saudi sample, the mean arch widths were narrower when compared to a Turkish sample,19 a North American sample, a South American sample, a Korean sample,20 and an Egyptian sample;21 on the other hand, it was close to a Malay sample.22 These ethnic groups’ differences in arch dimensions explain the need for specific orthodontic arch wire for each patient, based on the initial arch form. 
user
This is no advice
assistant