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
Karve SJ, Panish JM, Dirani RG, Candrilli SD. Health care utilization and costs among Medicaid-enrolled patients with schizophrenia experiencing multiple psychiatric relapses. Health Outcomes Res Med. 2012 Nov 1;3(4):e183-94.
Karve S, Misurski D, Miller J, Davis KL. Costs of sequelae associated with invasive meningococcal disease: findings from a US managed care population. Health Outcomes Res Med. 2011 Nov 1;2(4):e215-26.
Glass RL, Rothman KJ, Espinal F, Velez H, Smith NJ. Prevalence of human dental caries and water-borne trace metals. Arch Oral Biol. 1973 Sep;18(9):1099-104. doi: 10.1016/0003-9969(73)90083-6