TY  - JOUR
A1  - Shrank, W.H.
A1  - Patrick, A.R.
A1  - Brookhart, M.A.
T1  - Healthy user and related biases in observational studies of preventive interventions: A primer for physicians
Y1  - 2011
DO  - 10.1007/s11606-010-1609-1
UR  - https://doi.org/10.1007/s11606-010-1609-1
VL  - 26
IS  - 5

ER  -