
https://agsjournals.onlinelibrary.wiley.com/doi/abs/10.1111/jgs.16022
Banack, H.R., Kaufman, J.S., Wactawski-Wende, J., Troen, B.R. and Stovitz, S.D. (2019), Investigating and Remediating Selection Bias in Geriatrics Research: The Selection Bias Toolkit. J Am Geriatr Soc, 67: 1970-1976. https://doi.org/10.1111/jgs.16022