Influence of population versus convenience sampling on sample characteristics in studies of cognitive aging by Brodaty, Henry, MD, DSc, Mothakunnel, Annu, BPsych, de Vel-Palumbo, Melissa, MPsych, Ames, David, MD, Ellis, Kathryn A., PhD, Reppermund, Simone, PhD, Kochan, Nicole A., PhD, Savage, Greg, PhD, Trollor, Julian N., MD, Crawford, John, PhD, Sachdev, Perminder S., MD, PhD

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