PT - JOURNAL ARTICLE AU - Pam Aaltonen TI - Progress on gun violence prevention constrained by unanswered questions DP - 2019 May 01 TA - The Nation's Health PG - 3--3 VI - 49 IP - 3 4099 - http://www.thenationshealth.org/content/49/3/3.1.short 4100 - http://www.thenationshealth.org/content/49/3/3.1.full SO - Nations Health2019 May 01; 49