TY - JOUR T1 - Re: Identifying Problematic Substance Use in a National Sample of Adolescents Using Frequency Questions JF - The Journal of the American Board of Family Medicine JO - J Am Board Fam Med SP - 152 LP - 152 DO - 10.3122/jabfm.2020.01.190300 VL - 33 IS - 1 AU - Jeffrey Zeleznik Y1 - 2020/01/01 UR - http://www.jabfm.org/content/33/1/152.1.abstract N2 - ER -