Christensen T, Riis AH, Hatch EE, Wise LA, Nielsen MG, Rothman KJ, Toft Sorensen H, Mikkelsen EM. Costs and efficiency of online and offline recruitment methods: a web-based cohort study. J Med Internet Res. 2017 Mar 1;19(3):e58. doi: 10.2196/jmir.6716
Poole WK, Pollack M, Rapoport I, Williams V, Koch MA, Rao AV, Bartel DA. Use of Multivariate Methods in Quantifying the Variability in the Perception of Neonatal Intensive Care Unit Characteristics in Nine Hospitals in the Washington, DC Area: the NIH-DC Initiative to Reduce Infant Mortality in Minority Populations in the District of Columbia. Interstat. 2002 Jan 1.
Burke GL, Anthony MS, Vitolins M. Dietary soy protein and lipids: a strategy for primary prevention of cardiovascular disease? Current opinion in endocrinology diabetes and obesity. 1996 Dec;3(6):508-13.