APA

Sanni Ali M., Groenwold R. H. H., Pestman W. R., Belitser S. V., Hoes A. W., de Boer A. & Klungel O. H. (20130716). Time-dependent propensity score and collider-stratification bias: an example of beta2-agonist use and the risk of coronary heart disease. : European journal of epidemiology.

Chicago

Sanni Ali M, Groenwold Rolf H H, Pestman Wiebe R, Belitser Svetlana V, Hoes Arno W, de Boer A and Klungel Olaf H. 20130716. Time-dependent propensity score and collider-stratification bias: an example of beta2-agonist use and the risk of coronary heart disease. : European journal of epidemiology.

Harvard

Sanni Ali M., Groenwold R. H. H., Pestman W. R., Belitser S. V., Hoes A. W., de Boer A. and Klungel O. H. (20130716). Time-dependent propensity score and collider-stratification bias: an example of beta2-agonist use and the risk of coronary heart disease. : European journal of epidemiology.

MLA

Sanni Ali M, Groenwold Rolf H H, Pestman Wiebe R, Belitser Svetlana V, Hoes Arno W, de Boer A and Klungel Olaf H. Time-dependent propensity score and collider-stratification bias: an example of beta2-agonist use and the risk of coronary heart disease. : European journal of epidemiology. 20130716.