Resource Type CF Research News Authors Zelnick LR, Schildcrout JS, Heagerty PJ References Stat Med. 2018 Jun 15;37(13):2120-2133. doi: 10.1002/sim.7633. Document CF Research News Article Link Scientific Abstract Keywords biased sampling epidemiological study design longitudinal data analysis Date Friday, June 15, 2018 Featured resource article Yes Resource - Guideline Type Other Guidelines