"study number","owner","title","investigators","doi","time period"
"25281","NACDA","National Survey of Midlife Development in the United States (MIDUS II): Cognitive Project, 2004-2006","Ryff, Carol D.; Lachman, Margie E.","http://dx.doi.org/10.3886/ICPSR25281.v5","2006"
"29282","NACDA","National Survey of Midlife Development in the United States (MIDUS II): Biomarker Project, 2004-2009","Ryff, Carol D.; Seeman, Teresa; Weinstein, Maxine","http://dx.doi.org/10.3886/ICPSR29282.v4","2009"