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

(K. Lasser, et al, 2011) While Lubetkin et al (Lubetkin, Lu, Krebs, Yeung, & Ostroff, 2010) have shown that PCPs serving low-income, racial and ethnic minority patients are interested in providing tobacco-related patient navigation services at their practices, we are unaware of prior studies that have examined the acceptability and feasibility of patient navigation for smoking cessation in practice. 
user
This is no advice
assistant