TY - JOUR T1 - Marijuana tough to study due to current laws: Researchers struggle even as drug’s popularity increases JF - The Nation's Health JO - Nations Health SP - 8 LP - 8 VL - 47 IS - 2 AU - Elizabeth Rasmussen Y1 - 2017/04/01 UR - http://www.thenationshealth.org/content/47/2/8.1.abstract N2 - Scientists who want to evaluate the health effects of marijuana — whether positive or negative — are hampered by barriers to researching the drug, a new report finds. ER -