Primary and secondary non-response: in need of operational definitions in observational studies. Vallejo-Yague E, Keystone EC, Kandhasamy S, Micheroli R, et al. Ann Rheum Dis 2021;80:961-964.

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Amedeo Smart

Independent Medical Education

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Vallejo-Yague E, Keystone EC, Kandhasamy S, Micheroli R, et al. Primary and secondary non-response: in need of operational definitions in observational studies. Ann Rheum Dis 2021;80:961-964.
PMID: 33883161