TY  - RPRT
TI  - Evaluating disease management programme effectiveness: an introduction to instrumental variables.
AU  - Ariel Linden
AU  - John L Adams
PY  - 2006
DO  - 10.1111/j.1365-2753.2006.00615.x
UR  - https://pubmed.ncbi.nlm.nih.gov/16579823/
ID  - 16579823
ER  -